REVISIT | SEGA Mega Drive (Genesis) 2 | BLACK SCREEN | Can I FIX It? 

After worked in electronics for more than 20 years, NOTHING comes close to that feeling when you finally fix something that`s been a total pain in the ass :) well done bro.

I really feel like I went on a journey with you, this was a great watch! I actually laughed out loud when that sega logo popped up!

if their's one thing i love to see it's a 'f**king get in!' moment. those combined chips (315- series) fail in much the same way as CPU's and PPU's in SNES fail, repeated heat cycles and age eventually break down the internal connections of the chip, with the chip expected to do so much more than in earlier models its failure can throw up some very esoteric issues! often people harvest them in order to fix the much rarer Sega CDX unit as they're affected even more commonly.

The resultant "get in there!" was class, great result we are ready for the next instalment!!!

It's too bad I'm only seeing these a year later. I'd have been able to save you a bit of headache. All's well that ends well. Love the vids, my dude.

I appreciate your patience and your will to return to such a lengthy and difficult fix! I sure learned a lot from both those videos. Thank you.

Hi Steve, Congratulations on fixing this unit. It would help you to know a little more about AC theory. The Inductor is basically a coil of wire. The properties of an Inductor are, to pass DC and impead or try to block AC current flow. I believe your knowledge is mainly DC theory based and that's why you don't really understand the purpose of the inductor. This is common when learning electronics its often the first thing that's learned along with ohms law etc. It appears in this circuit that the Inductor and capacitor in parallel form a tuned circuit. Tuned circuits are intended to be used to pass or block certain frequencies, they have what's called resonance. This combination of inductor and capacitor could be referred to as a filter circuit. The Capacitor will block DC but pass AC so it has the opposite characteristics to the coil or inductor. To better understand, look at the impedance characteristics of an inductor and capacitor compared with frequency of an applied signal.The coil and capacitor are opposite to one another if you look at the characteristics. I hope this helps a little. Andy.

I love seeing/hearing the excitement of hard work paying off, excellent.

It gives me great joy to see you work things out and get it working. I understand the feeling. Great job sir.

loved this follow up video even though its two years old . most people would have given up a lot faster but congrats on making two very epic and enjoyable videos , i have binge watched a ton of your videos i am so glad i subscribed please continue you are awesome !!

I've been going back and rewatching all your videos, and this fix is one of my favorites ❤

That relieving feeling when you replace basically everything inside the case with parts that work so that the franken-console rises from the dead ^_^

Wow such perseverance. Such a nice journey to have followed alongside. So many twists and turns but it all led to a happy ending. Good job!

Nice video! You have determination. You got your reward: you fixed this incredible console.

i'm glad you posted a follow up. i hate when it's a no fix. super happy you solved the puzzle.

There was almost...tears of joy 😂Well done, brother!

Late to this party, but congratulations on your dogged determination and perseverance. I am full of nothing but admiration!

So happy for you! Great to see it working!

Great job! I knew you could fix it :) I was about to suggest you to check the main crystal (I saw a video yesterday where a broken crystal caused the same black screen) but then you have fixed it in the last 2 minutes of the video :)

congratulations on your success. it was instructive, especially when it came to patience

I just commented on the old video, I'm glad to see that you returned to this.

The elation that you feel when you fix something and It bursts in to life. Incredible feeling 😁😁👍👍👍👍

Great set of videos . So happy u finally got it sorted even if its had more parts changed than triggers broom did Iol

well done mate your persistence paid off

That is determination if I've ever seen it. What a great result for you!

Nice ! I did not expect this chip to be faulty. Bravo !

After all that you finally got it, congratulations, I don't have the patience for what you do. It's very interesting to see you work through the problem to fix these devices and prevent them from becoming e-waste.

Its the parts cannon approach to repairs... LOL. Congrats for getting it fixed!

yeahhhh!!!!! finally! Great work, congratz!!!!

Just followed your progress. Well done.

Congrats!!! Nice repair!

Love the Sega repairs!

After watching the saga of Part 1, I just had to find out if you eventually overcome the flippin' thing....!! Sooooo pleased you got there in the end 😀

Well done mate, awesome fix :)

Well done buddy glad you fixed it 😁

FINALLY!... that one was a right mystery, well done.

Wow, awesome :) Such persistence paid off !

holy heli ....i am so happy for ya ....oh the drama!!!

I just binged watched this entire series of MegaDrives. Loved them all and so satisfying to see you conquer them both. Excellent work.

Awesome followup 👍 been looking forward to this 👏👏👏👏

Great video. I have very similar problem, but I don't even get copyright screen. I tried everything, like cleaning slot, looking for broken traces etc. After this video I just checked capacitor C30 and found out it is shorted too. So maybe the same issue, but I am not able to replace chip right now, I need to get some spares. But thanks this video, I finally move to some direction with it. Thank you very much for great content.

I enjoyed the ding ding ding ding dings 😢 wanted a "You pocket up an inductor, apple and bread and magic potato" ding 😅😅

Got lucky??? You spent days working on that thing, you earned it!

Whoo~Hoooo!!! Love that adrenalin rush when the unit comes to life, I guess someone already suspected the main chip "what with that cross on it" The good thing is you now know a thing or two about a circuit that filters out unwanted upper and lower frequencies filtered out by a capacitor for higher frequencies and an inductor for lower frequencies, AKA "A Notch Filter" BTW if that hum early on in the Boot is not a common theme at least compared with yo other Mega Drive, then that suggests a problem with a capacitor not working properly, this BTW could be a problem as it could be allowing unwanted voltages to creep into sensitive components "The IC you replaced perhaps being one of them", A quick check with an oscilloscope on all the various voltage rails that show a wave form rather than a steady DC voltage should point to where in the circuit a component is allowing a Wave form to exist where it shouldn't, Failing components to suspect are Capacitors, Zener Diodes, Rectifying Diodes, and or Voltage Regulators, that may be out of spec or near to failing..

Hi bud what great to see this nightmare cometh to an end well bl....dy done 👏

Glad you got there in the end. So it seems that C30 was part of an LC circuit, these basically create a resonant signal (think of it as the electronic version of a tuning fork), often used as in filters. It just goes to show that you have to understand the context of what you are looking at, without a circuit board in front of you it's difficult. So a lesson learned and that is the aim of the game.

You have mad soldering skills. I'd need to ingest a bit of alcohol to steady my hands like that. Good job :)

Nice one Steve. I'll have to find a donor board and swap mine over too.

1st class video to watch thank you take care kind regards from me kenneth

perseverance! hard work pays off!!!

Wining prize you got sonic to play

Great work getting it up and running mate, when it came up SEGA, I thought I was watching an x rated Vince video lol, again congrats, and can't wait for the next one

Brilliant just brilliant well done buddy

Great news well done 👏

Kudos mate! This was a great video, it’s encouraged me to try repairing my Sega Genesis [which doesn’t boot up] again. I’m not formally trained, I’m just an electronic enthusiast and videos like this, are truly motivating. Again, congrats on the repair mate, I felt SO happy for you, when the Sega logo appeared… just AWESOME! Cheers mate

Never!! In all my many decades have I seen a dead ASIC on a Sega mega drive. The amount off consoles I've de-modded changed RGB chips V-Ram chips Slots etc.. I've lost count off them. I'm so surprised it was the Asic chip all along. Steve that's got to be documented, that thing took a few of us down rabbit holes alright. So, so pleased it's fixed & BIG! Massive thank you! for the shout out, much appreciated. I am so tempted to start making videos in 2021 thanks to you!! 😊🖖👍 Castle of Illusion is my all time favourite for the MD You played what some may call, the sequel to it. Castle 1 player World 2 player that's the biggest difference.

That Junk Board Err-Donor Board might be an easy fix if you can get a second hand working Sega Chip and then a replacement for perhaps a fuse, regulator or whatever other faulty component, it should be easier because most revisions have a lot of the main Chips the same, and between the two working boards you can compare roughly what each chip should test like, and that's without having to power any of them up..

Sometimes NC pins are for manufacture or testing purposes and are internally attached and do perform a function. It’s best to let them float and not ground them unless specified in the data sheet.

Yo GET IN THERE!!!! That deserves a cold pint.

Inductors perform as a short with direct current. They can be placed as shorts to ground as part of a high pass filter.

to me i saw a huge crack across the cpu when you took it off? maybe I see things anyway it was a journey this one. good result.

Take the controller port from the donor board and put it on the other one.

congrats mate

Bravo 👏

Steve I think you are a brave man for a start doing this work and Admitting you don’t know what you are doing on camera but you persevere so I take my hat off to you well done sir I enjoy watching you well done 👍 may you have lots more good results 👏👏👏👏😊

Great repair - never give up ! Now sega lives again !

Thank you very much for your video, I have a brazilian sega megadrive 3 with the same problem, the PRODUCED BY OR UNDER LICENSE FROM SEGA ENTERPRISES LTD turns on and then black screen. I'm going to change the 315-5660 chip and see what happens. 👍👍

Congratulations! Great job, but I wonder, if I missed this in an earlier video, was there not an X drawn on that original chip on the bad board??? Did you put the X on it or did someone else? An X to me means bad, I saw you put an F on a chip you thought was bad, it wasn't, but I see many others put X's on bad chips.

Congrats, for future reference NC is not connected' or 'no connection' and some manufacturers leave the mask off the pins so they can bridge

What does an inductor do? I almost dropped my phone , 🤣. Mainly used for filtering or oscillators, but they also acts as temporary magnetic energy storage in switch mode power supplies. Also, a speaker is a magent and an inductor basicly. So they do a lot. 😄

THE TRANSISTOR!!!!!

nice

Hi steve! I got same problem with my VA 1.8 board. C30 is "shorted" . I did suspected to be rgb encoder before i watched your video 🤣 Can u tell me is c30 still "shorted" after u replaced main chip? Thank you.

That was awesome! 100th comment!

Would love to see you work on a Master System 1 or 2.

👍👍👍👍

My model 2 is doing the same thing. It will boot to the black Sega license screen then just go black. From what I have learn that license screen is the region lock screen. Old model 1 Genesis that don't have that screen are not region locked and will play US Europe and Japanese games. So I am guessing the issues is something to do with that rgb chip from the first video. The chip that pin 7 was something to do with NTSCU.

Need to get me one o them chip poppin tweezers.

Just wondering if perhaps, you could help me identify that little black component, that sits next to the input voltage jack? Yours is marked RC 04 E [on my Canadian Mega Drive, it says: RC 04 U and on the PCB itself, it’s “labeled” CF1]. I’ve Looked all over the web and all I could find is that CF might stand for crystal filter OR perhaps current follower - as I am a complete NOOB, I have never heard of either of these two things - so, what is this four pin device? It looks like an opto-coupler to me… Any insight will be greatly appreciated. Thank you kindly

hello sir, i want to ask about my sega md 2, it melts in smd ceramic capacitor parts. which is at number c22, adjacent to the BA10324AF ic SMD in the On/off button area, my question is what is the current value of the creamic smd capacitor, thanks, have a nice day

Fix one... it was a cold solder joint on the crystal.

couldve checked whether the induction shows up as a short on your operational mega drive

…👍😁👏🖖

Hello i have a mk3 cartridge, the game at start has blie screen in console, i test de memory resistors and cap and all be ok..

It looks like some or all of the shorts damaged the CPU. Fault finding is all about trial & error, sometimes it's mainly error.

Can I ask whats the specific model of the microscope you use?

I think NC means normally closed

Would you take a repair? I have a MD1 that powers up but no picture.

You can’t be sure if it was the big chip or the encoder, since you didn’t test it with the replacement encoder and original chip. For all we know it was the encoder

Help bro my MD2 black screen but sound is ok

Revisit. Sera. Mega. Drive. Genesis. 2. Black. Screen cut.

Not often the CPU goes.

Is this Part 3 ?

Why was Sonic running slow?

Well I was wrong on the last video

I'm half way through watching this Sega saga. My intuition is telling me this is either a ROM problem or a power supply problem because obviously some code is running and the result is making it to the display, and then it stops. Unpausing to see the conclusion...

Can you fix my boys ps5 keeps shutting down please

Where's part 1 ?

my friend do you have a schematic for it? can I share it with you?....

My Gamepad of SMD is Broken, no UP Button, noooooooooooo!