How a working partially shorted Chipset/PCH looks like Dell Inspiron 5402 shutting down, freezing 

Sorin started off saying "nice laptop" and ended with "cheap laptop" lol. nice diag as usual!

sorin its the bios chip (not the program the chip) i had the same issue with my dell precision 5530 it took me a month to find the problem, first my laptop would turn on after a minute then after a couple of weeks i had no sound (weird!) i programmed the bios but the issue stayed the same then one day i was trying to program a new version i realized the bios chip wouldn't program but when i heat it slightly it worked fine i bought a winbond chip instead of mx all problems magically solved i even had sound after that

0:21 I must say - that is VERY detailed professional issue description. Too bad that most of the customers can only say "it doesn't work"

30:39 yes you have right. touchpad, keyboard, fan speed, temperature sensors, LEDs, power button - all are managed by Super I/O (KBC, EC chip)

I think the desing of the power button is like that becouse it has Finger Prin Sensor on it :D nice video :D

Aim whether its the PCH or other SMD supporting components on the RTC power tack. Find Schematics and check all the components on RTC. If it's a PCH, it will be very hard to swap PCH and CPU preheat and hot air.

Thanks sir sorin .

I have Dell Inspiron 3542, I was fixing it on BadCaps Forum, then continued on Electronic repair school, it would power on, but no picture. Then I heat up cpu, gpu with drying fan, and squeezed around cpu/gpu (not the chip itself) and it works now, only thing is if I shut it down, it can be no image again, LED light is sometimes working, sometimes its not working. I noticed if i put it to colder ambient temperature, laptop would turn on with Image. And my solution was, to never put laptop to Shutdown, instead I customized to go to Sleep, instead, when I close the screen, or when I press power button. It has working battery and during sleep electricity stays in chips that are semi-faulty, and it turns on with image 100/100 everytime. Its not fully fixed.... But it can be used. I tried to stress test CPU for around 7 minutes, it was working perfectly, no freezing, nothing. Its running fast, temperatures are cold around 55-60 celsius, which is absolutely fine. So basically its a lottery what will die, in your case, it was freezing and completely unusable laptop. For more details what was worked on and tested I'll put the link below, if someone is interested to read deeper, or if we didn't diagnose issue fully, and you know something I'm open to suggestions! :) badcaps.net/forum/showthread.php?t=117390&page=2

Use best thermal paste and wire the fan to spin at max speed.

I'm almost convinced it's a faulty chipset, but I would replace the heatsink just to make sure it isn't a faulty heat pipe causing the problem. Although 630mW is a lot of power to consume for just an RTC running in the chipset. Would be interesting to compare with a working laptop of the same model.

hahahahahhahahahhaha i jumped from chair from that sound LOL that designer was deaf 100% :D

That is nuts!

Good job mate 👍

In some laptops heatsink heat pipe failure/degradation it's possible too

Waiting for the day, the customer writes on the ticket: Hello, so we're back, but this time we hab a customer job... here we have a Dell Inspiron, this is a niiiiice laptop You should test the current without the charger, because internal circuits in the charger can also draw some power, when you come with more voltage than the charger!

5 beeps. Real-Time Clock Power Failure. CMOS battery failure

I had similar issue in my HP 17 inch 11-th gen i5. At the begining it indicated as the faulty CPU. After return to the laptop service point they have confirmed the fact that the CPU is faulty (inside short circuit) and it gets hot so quickly without any stress and turn off.

i cant' understand how 0.63 Watt can give that heat to the PCH. In my case, if this is was on my hands, i would try to reflow the chipset with alot of flux around it and see if that would help. Sorin, give it a try please and let us know.

Ten dźwięk jest taki głośny dlatego żeby aplikacja na smartfona go usłyszała. Jest aplikacja która mówi co jest uszkodzone. Te dźwięki to kod usterki. Aplikacja to rejestruje na telefonie przez mikrofon i pokazuje kod usterki. Pozdrawiam z Polski.

R. I. P the chipset 😢

jump the fan connection and make it run at high speed the moment you turn it on. that should work.

SORIN!! HOLY SHIT THAT SOUND WAS FUCKIN LOUD

Power button has a double function: fingerprint reader and power switch.

Bios eprom may have issue

i think the heat from cpu infect the chipset that mean the fan should be work in high speed all time and because the fan is far from the cpu means the cpu heat reach the chipset quickly. it good idea that intel design cpu and chipset in same socket to make communication faster but they chould improve the chipset heat managment and quality.

Buna, senzorul termic la cpu este defect si ingheata imaginea. Va porni in momentul cand se receste procesorul.

Tpm can occur when bios is flashed or updated in dell. it is error in tpm region. Sorin it is not hardware problem, just look for ways to disable tpm.

I have a Lenovo v15 ada, AMD Ryzen 5 3500U. Am having almost identical issue. It always freeze with the heat sink and works perfectly when I remove the heat sink and use an external fan directly to CPU

5 beeps cmos failure.There is no seperate cmos battery it use from main battery to save cmos data in bios.On dell laptop without cmos battery no picture.

i have the same problem in 30.27 nooooo thought mine i can use still after restart it it keep repeat BUT if i play games in it it doesnt crash? ,freeze (infinitely?)? please enlighten me

If they installed the nvme drive without disconnecting power and battery that could be the cause of this failure. I've seen it happen many times.

Left in fridge hahaha what a new way to cool laptop

standby current is max 10ma i here is 30 which is not normal, probably leaking some capacitor which makes partially short

pls explain about rtc and pch connection

Would it be helpful to check schematic and see pinouts. Maybe chipset is sourcing out one of its pins and can short kill it.

We should not putt the thermopast on the pch, the cpu will transmit heat to it .

I have same laptop AMD version. Exactly same issue but you know what...the laptop works with Linux and freezes when loading Windows. I have mosfets that are getting hot and CPU after the freezing happens Bios chip had blown underneath so you couldn't see it. I now have installed new bios chip with new bios but laptop only works in Linux still. I guess it's software in my case because absolutely everything works in Linux

Why do you use thermal pads with no heat sink when trying to cool off hot ICs? In any application I've seen, thermal pads do not dissipate heat. They move heat from a device to a dissipative radiator. Making a heatsink out of thermal pad material would be silly because they're really quite crappy in terms of actual thermal conductivity.

I absolutely hate that BIOS error noise Dells make! What was the programmer thinking, making it so loud and obnoxious? LOL!

I had a XPS 9550 same problem I unhooked the touch screen cable and it worked but if I plug it back in then black screen same as this unplugged again same problem so I left it out

Is it possible that the chipset can get too high voltage? "In those days" the chips are made to work on very low voltages. If it gets too high voltage it should get hot and stop.

Can we start working with schematics like getting schematics from where and how to read them

My laptop used to have distorted screen and wouldn't respond. Use to have failed multiple restarts. Now its working fine. What is it??????

Wow. Never thought that Intel CPUs can be defective like that, I thought only AMD fails like this...I knew that Intel and AMD were switching who makes good chips, but I never knew that they always switch. I wonder, can you get it working (sort of) by blowing hot air at PCH die?

❤

Charge the bios chip and the problem is over

So guys, expect from now on to use laptops only when it's snowing outside and it's -5 *C

maybe turn off turbo mode to keep the cpu cooler. that might be a solution

how about reball?

are you not in the mall shop no more?

I don't get why they pun TPM device inside pch, and pch inside cpu substrates.

Sorin what's the name of your power supply?????

How can 30mA overheat a laptop?

Maybe reflow the CPU without replacing?

Do you think one of the minor capacitors on the cpu wafer may be short and linking sections between PCH and CPU? Long shot but worth checking.

I recently had an Acer laptop from a customer with an Intel i5 8th gen CPU with the very same fault. Since the CPU and Chipset are coming together, there is absolutely nothing you can do. You have to buy a new laptop. Poor design, money is all that matters 🤑 How good socketed CPUs were 🙃

hello, i am getting whea_uncorrectale code, please suggest what should i do, i have reinstalled windows a few times, updated drivers from dell site too, but when i try to troubleshoot audio issue or leave laptop for few mins it shows this error, could anyone suggest what should i do

time to change cpu with airstation lol

try to change the ram

It's beeping because it's about to back up.

better invest on new board or laptop, the cost of the chip and repair is very expensive and its chance to be repaired is 50/50

Dell ram noise that

The Power button has a fingerprint sensor

It's so cheap it only works between -273.15 and -100 degrees LOL

Crazy matherboard .

First thing I would do is unplug that stupid pc speaker LOL

I don't think its PCH issue 🤔🤔

I am first good job anyway :)

Bios....lol

this laptop should have been returned to dell under warrenty

The fault of the modern laptop

That MOBO was designed by some drunk in China.

Just get a used motherboard for it - solve the problem

put a peltier on cpu and chipset to keep -5 C and will work fine :) lol

new designed laptops are so garbage and so badly engineered!

Its 100% chipset fault.I have seen often this kind of Problem.Replace this shi...combined and it will be solved.I hate this combined solution of Marketing Trash 😂.I5 U (Underground?)😅

broken solder joins on the cpu maybe.