XBOX One Light of Death - Bad MOSFET and power regulation circuitry - Diagnosis and Repair 

Very nice to see people fixing things rather than throwing away. These companies should be made to help us fix our electrics

I love watching and hearing you explain andrew very much , it's nice to hear how much temperature you put , flux etc etc welll explained and keep up the good work

Nice work Andy, I had a power issues one that I had replace the Southbridge on and still no dice. Have just checked and I have the exact same issue as yourself but no visual damage apart from a tiny dot where it's started to burn! Thanks!

This partially fixed my Xbox one issue, but it still shuts off at times. Good video! Keep it up.

I have an Xbox One here with the same exact issue on the same exact phase. Your video is a huge money saved! Thank you very much!

I love RU-vid and all the smart people on it creating content. You great people have made me so smart.

Your a electrictronics wizard. Thank you for these great videos

you are great your videos are great and have clear instructions as to what you are doing great job. you got my sub and a like :)

Love the vids your really in depth

Nice job man!

Excellent work.

finally someone that knows what there on bout thanks m8 cant believe theres not more about this

Very well done! Very professional

Ive had exactly this happen to me yesterday and im going to check in the morning to see if i can rectify this issue, cracking video and hopefully thanks

Great work. I was wondering what temperature on your soldering iron do you usually use in these kinds of situations?

Awesome I miss real trouble shooting like this

exelente su trabajo, lo sigo mucho desde colombia ¡¡¡gracias!!!

Quality work!

any recommendations on an xbox one that wont turn on? i have replaced the front panel and the board behind it and it still wont power on...?

love your work

any ideas if it doesnt start up at all, tried 2 different power supplies, its not the outside power switch, and it happened after i removed the blu ray drive because a disc was stuck inside it, also sprayed it with canned duster.

Hi tested my board and need a capacitor how do i find out what it is and where to get it thanks

Nice video Andy ... my xbox did the same thing but i tossed it and got a new one after 2 people looked at it and had no clue what was wrong with it ..im sure this will help others with this problem ...keep the videos coming

Dear Andrew, What temperature settings did you use for air gun and soldering iron? Many thanks

I have one in same condition as in the video where can I get the mosfet chip at

Hey Andrew, this video was really helpful in helping me troubleshoot, even though I found out the issue was completely unrelated. I'm wondering if you can give me some advice: My XBONE has the prepetual orange light no matter the power supply, so I took it apart to troubleshoot. I plugged it in without the whole thing put back together, and it fired right up. As soon as I plugged the WiFi card in, the Xbox died. I can run the Xbox without the WiFi card, but then I don't have wireless controller capability. I'm not saavy with electronics, and am wondering how I can test if this is an issue with the WiFi card, or an issue with the circuit board. Any input before I buy a WiFi card that may not work?

I was cleaning my Xbox and fan with dust off and I stuck a paper clip in to hold fan in place idk why I did that but seen some people online say to do that... then when I went to power it on it just turns on and off now. It won’t stay on. The dust can did spray really cold. Do you think it froze something

Ótimo vídeo amigo parabéns pelo trabalho! Aqui no Brasil também têm um cara muito bom! Manda mais vídeos de reparos em xbox one por favor! Valew!!

Hello Paul...would have any idea on the board to start looking for an xbox one that wont power? light stays amber the whole time...no evidence of blown anything on the board..thx.

I just sub to you I can learn a lot for u you a good teacher

Hi Andy, loved the video. I have an xbox that wont turn on anymore. I plugged another power brick to it and the light stays orange. there is no sound or light when touching the (X) button. I pulled my xbox apart since it's out of warranty and looked at the board. there are no visible signs of anything blown like in your video. I will be using your voltage diagram to check everything. Two questions: Is there a power LED on the board somewhere that lights up showing that i'm getting power? And in order to test the board (out of the case) do i need to have all parts connected before it will work? (I.E. -- fan/disk drive/Hard Drive/WiFi board, etc...) thanks.

Great video!!! Though, what if you have the light of death, but everything on your circuit board looks totally normal?

hello, good video, what about if the 3 pins on top and the four on top of the mosfet is beeping with the tester and beeping in ground also ?

Very good Andy

got exactly the same, but unfortunately when all components was replaced, the only changes I can see that orange light stays on, when you press on button it changes to white for less then sec and goes back to orange, before was when plugged power cable no light on power brick at all. any suggestions?

Hi Andrew, thanks for this great tutorial. Just a question for clarity please... It looks like the blob of solder underneath the larger chip that you replaced is spread out like a pancake and would short the pins along each side of the chip. Are those pins supposed to be apart or shorted? Thanks

my xbox does the same thing and i finally found some one who actually had a video that told me what is wrong with my xbox

I'm having a similar problem with an Xbox one S model. I found that the fet on one of the phases was shorted open and replaced it. Now, instead of the board being completely dead, I get the startup chime, then it goes dead again. I have tested all 3 phases and the one closest to the power plugin area reads .637 and then I turn the leads around and it reads 1.937 when testing the leg of the fet to the resistor, whereas the other 2 phases read .637 and 1.967. All other electrical components that I've tested look and read normal, so I'm at a bit of a loss as to what could be wrong. Any advice or can you point me to a forum where discussions like this take place?

would you take a look at my motherboard i turn it on it goes from orange to white for about a sec wont turn on all i get is bep and one spin of the fan

what a great channel !

Good job 👍

Bro please help!!!!!!!!!! I have 2 original Xbox one motherboards with me, I tested the C9F12 little chip thing (still new to this) and on one of the motherboards it shows OL and on the other 0.70! Both are defective but could the open loop one be the issue for one of them?!?!

How do you know what little component is ( capacitor, transistor...) and how do you know if it's gone bad? Measuring resistance? What resistance should they be?

Great Job Andy but just remember when your measuring the resistor or the capacitor inline one or the other could be fine as they are both on the same trace you would need to pull each component of separately to correct test them :) but the other resistor in front of fet defiantly made sense that it was short that probably caused the fet to blow PS did you manage to find those ps4 parts for me ? Thanks Lee

Hi - anybody know whether I could power an Xbox 1st gen directly from a solar battery bank or would I need some form of regulation? The solar bank's voltage ranges from 14.4 at bulk charging down to the battery voltage at night. Any thoughts? If so what kind of regulator would be best? Atx, buck/boost?

I'm getting readings from all the caps raising from 120 ohm and up. What Could cause them all to be bad on all phases?

Dude this video was awesome! Great work and thanks for sharing. ✔

I love your video Andrew straight to the point good work but have a question all my capacitor reading 001 can another capacitor cause that problem please anything would help 😞😢😭😭

I know this is an older video but all my capacitors are reading at aprox 9.5 apart from one reading at 71 probably obvious but would that mean that all the capacitors are bad or the one that isn't close in readings from the others ?

I'm about to replace some mosfets on a broken xbox one s that I found on Facebook marketplace for very cheap and try smd work for the first time I'm not getting my hopes up with positive results but more of a lesson for myself , what's a good heat gun temperature to work with??

I have an Xbox one original same to yours. I’ve looked everywhere and can’t find a single thing that looks bad. Used a thermal camera and only a few things light up. APU. Little bit of the chipset and the mosfets on the side (all normal apart from APU is hot in one corner. Not sure if that’s meant be like that?) my Xbox one is going white amber white amber (3 times as you said) and nothing else. Could this still be a chipset issue?

hey Andy I have no idea how to do any of this kind of stuff and I have it any professional advice for what i should do

trying to diagnoise a xbox one with the same issue. now i followed the troubleshooting steps and got exactly the same readings on each phase. now whats the bigger looking mosftet? to the left on each phase? Now my suspicions are because when testing resistance out of the 4 phases (revised board). The bottom 3 pins closest to the left give me a reading of 0.104v. The fourth pin furthest to the right gives 1.570v. The other 3 phases on the same pins of what I "think" are mosfets are 0 apart the fourth pin closest to the right which are also 1.570v. Am I right in saying they're mosfets or something esle? and my readings correct? Thank you. Its 4:50am and I feel I've learnt alot from you as per usual! thank you

Hi great video!! I have exact issue here, I’ve checked the components for a burnt one to replace but all seem to be working. Do you have any other solution for solving this issue please?

@andrew paul how do you check u9d4 if it is okay

Andrew, any recommendation on fixing my Xbox One 500gb. I have the orange light on brick, bought two different bricks from amazon as that was the top problem from youtubers but did not work. Now, the machine does not light up in front. Any recommendations on what the prob would be or repairs shops in the US that could fix this.

I have a xbox one that won't power on at all im trying to diagnose and your videos are very helpful. I have a capacitor c9e6 above the first mosfet and resistor that's reading 210 ohms. All the others in the same position are reading 11 ohms. Could this be the reason for the no power issue? Thank you

Mine powers on fan dose not spin then shuts off. I did take it apart to check if anything was blocking the fan but nothing was. Got another fan same issue. Tried all the reset methods and still nothing. Nothing looks burnt like in your video. Also tried another power brick and same problem. Power brick is Orange when plugged into it. Then when I plug it in it does turn white. So power bricks are good. So I have know idea what's wrong. Any help?

I used a Boxmod and the Mosfet burned up would you be able to replace it ?

Excellent Video! I accidentally dropped my XBOX One S and it will not power on since. No lights, no fan spinning, it is completely dead! I tried with a different power supply but no joy. Is there a particular place in the motherboard that i should check? Or is it completely toast? Thanks!

Great troubleshooting, observation and workmanship. I kinda do the same here at home as a hobby and enjoyed this video, as well the technique demonstrated. What causes this to happen overheating, bad fan heatsink, power surge, bad design?

It looks like the link to the XBOX One Standby Voltages Diagram is no longer functioning. Great video as usual.

my xbox keeps trying to start on but turns off again and again and the power supply keeps going white to orange white to orange and keeps doing that non stop, fan tries to spin but dosn't just kinda slightly moves and stops and the power button light on the console turns on automatically right after plugging in the console,the light also stays dim, flickers and turns on and off on its own.. what what should i check? (btw i got water on the board but i cleaned and dryed it but the problem is still there)

i have had to do this exact repair exact same mosfet and all

Hi bro can you help? I want to know about the ic What is the name? And where can i get that?

Hi Andrew great video can you help I have xbox one with no power I have tested the power rail and I get a high reading from the first big fat on the left H8318 D423P Q1lO but I don't have a working border to see if it should be the same as the other 4. Pls can you tell me if they all 5 should read the same. Ant

Hi do you think you can fix the motherboard of my xbox one i took it to a repair store and they said the motherboard has died out

i have a short on the 5v rail.how would you check the southbridge as all components leading to it look good

hi man! the image with the power rails diagram isn't up anymore! can you please help me getting this diagram for the original xbox? I would highly appreciate it!

@andrew Paul I have found that the caps that are buy the power input will make these look bad and cause no power or turn on then off issues as well

I have tge same xbox with the same problem but only thing nothing is burnt everything on the side you did in this video is good i was wondering if you woupd have an idea to what else i can do

Could you repost the diagram link to this if its still available. It would be much appreciated.

I have some problem like this but my Xbox turn on after 1_4 hour After it connects to the power outlet

I have one for the "strange" department: XBOX One, shuts down after 5 seconds if the internal HDD is connected. When it's not, it stays on. Tried with other HDDs, nothing. Different cable for the HDD, nothing. Any ideas? Thanks in advance!

Hi Andrew how's it going mate . V nice video I'm having something similar I have an Xbox one which works for 5 mins then it just shuts off . I have reflowed the APU but no change . Do u think the southbridge could be bad . All voltages test good when it's powered on and on stby.

Tell me andrew mine has orange light. When i push the switch on, i hear a beat sound from the speaker, the power supply light turns from Orange to GREEN and then the xbox one don't start, the front light of thre xbox one does not even has time to light. So from orange to green on power supply, very very quick green, a beap sound, no front light and does not turn on, There was a mosfet burn. I did replace it from eBay. I took the four first numbers on the mosfet and i did order it. I did put it in and same thing and the new mosfet was burned again, short with yhe little resistor at his up right(Gate short). What do tou think. All the capacitors near the mosfet, the big ones between the mosfet and the APU measure 7 or 8 ohms between them exept the 2 or 3 last ones measure like 98 ohm and all the little capacitors over the APU measure 7 ohm, all of them, almost. I had a short everywhere, i took the mosfet off, the short is gone exept all the big capacitors between coils and APU still measure the same 7,8 ohm. They are written 2.5 volts just to help you know which capacitors i'm talking about exept the 3 last ones of the last phase. What do you think? Thank you. regards. Serge.

Have you come across any xbox one x systems with a faulty u31 or u32 (location number on the pcb) chip?

Excellent job on fixing an xbox one great job on going step-by-step I noticed 1 smalle little details with this video Number R9E2C9E4 seems to be missing

+Andrew Paul Hey do you have a schematic for these boards? how do you know what the measurements should be? Do you measure a known good board first to compare? Great vids mate!

My Xbox one turns on then off after about 3 to 5 seconds. Changed the power brick and wasn't that any ideas? Didn't see anything unusual on the board.

what kind of capacitors and resistors are them on the Xbox One because I have an Xbox One does the same thing and want to fix it myself can you give me the information so I can buy them be greatly appreciated

Hello there. I just wanted to mention I clicked on the link and the diagram is no longer available on tinypic.

I opened up my Xbox one and found the inductor near all the voltage regulators blew. It took out 2 caps and a resistor around it. Has anyone ever had this happen? I don't know how to get the values of the caps and resistor without a schematic. Help!

My sons Xbox flash on off issue please how much would you charge to be able to repair please he is driving me insane.

EXCELLENT! ⭐️⭐️⭐️⭐️⭐️

I bought a new power brick and I plug it in and its white and turn it on it beeps like it's going to turn on but after 3 seconds it beeps again then it turns off,what can be my problem and the light turns orange. What can be the problem?

My friends xbox one took a fall won't turn on no it's not the s anyway when I plug a known good power supply into it and nothing stripped it down out of warranty hence why I got into it and I can't find any props on the board a lil nervous about taking heatsinc and clamp off too look don't want to do that if it's not the issue please help lol

Hi Andrew. I have an xbox one S with the same problem but the serigraph is different to the mosfet of your video, since it is a one S. It is the component 4C50 (Q9D2) I do not locate the component. Do you know what your datasheet or name is? Regards. Sergio

I have no power at all going through an Xbox one S motherboard. I believe it's the south bridge. Ever change any of those?

My Gtx 980M is shutting my laptop down instantly when it's usage goes over 90% for an extended period because that's when it's voltage fluctuates. Somebody said the MOSFETS are failing because the temps are fine and the GPU is not scorched anywhere. I don't have the tools to test of fix it yet but I'm wondering how much this might cost in labor.

Hi great video!!! I have exact issue here, I’m looking for a list to the components needed to replace? Would be a really good help thanks for reading and keep up the good work!

hey man!! very late comment, my xbox has the orange light, i plug the xbox in and it goes white beeps and then turns off and goes orange. any ideas. please ? thank you

What about no bad mosfet and reflowed gpu and cpu but still no power. Both power bricks work and my other Xbox powers up fine

Hey Paul , great video as always. Seems like the link to the XBOX One Standby Voltages Diagram is no longer working.

Andrew, what brand of flux and IPA do u use thanks ;)

So how could the MOSFET have blown that capacitor up or whichever component got blown.

Where do you buy replacement MOSFETs? Specifically the type you replaced in the video?

I get .65v one way but the other way I get nothing on all mosfets what is this all about?

thx 4 that could you do me a favor and give me a nice picture of the back side of the xbox one i lost a capacitor and i need to know the exact value of it .. thx

I understand nothing what u do :D But looks very interessting! And at least great work Andy!