U59 with a termal problem

alexander77 · Post time 2024-07-02 00:52:11

When rebooting the system when warm it will not start.

I tried to find the fault with a cooling-spray and found, when i cool down the marked part in the photo, the system reboots immediate.
Can anyone please tell me, what part that is, most likely a transistor, but which one?
Kind regards
Alexander

Support-03 · Post time 2024-07-10 10:34:27

341L replied at 2024-07-09 16:06
Yes. Worked for me, but then I returned the original component. Maybe it was a soldering defect.

Hi there,

I agree with you. If the original component will work , I think the issue is the soldering.

Support-03 · Post time 2024-07-08 11:25:05

Hi there,

It is BAT54C DIODES

Support-03 · Post time 2024-07-02 14:12:51

Hi there,

The marked part is diode .

alexander77 · Post time 2024-07-02 15:25:24

Thank you! Do you have more information, just a regular bipolar diode, a schottky or at best a type like bav99 or so?

Support-03 · Post time 2024-07-05 09:23:57

alexander77 replied at 2024-07-02 15:25
Thank you! Do you have more information, just a regular bipolar diode, a schottky or at best a type ...

Sorry, I don't have more information about it.
Could you please let us know what happen to your PC ?

341L · Post time 2024-07-05 21:14:38

I have the same problem. If you cool the area on the board shown in the photo, the computer starts up immediately.

341L · Post time 2024-07-05 21:20:27

This component on my motherboard is marked 5C. This is either a pair of diodes or a PNP transistor.

alexander77 · Post time 2024-07-06 00:33:48

Edited by alexander77 at 2024-07-06 00:38

The problem startet, when BIOS Information was lost. The battery was empty, but not 2V oe 1.5V, it was 0 volt. I replaced the battery, made the bios setup, started the operating system. After updates the os wanted to reboot, but the PC hang. It took a while, 20min or so, the i could reboot the system.
I dismantled the system, took a coolant spray, and sector by sector i tried to reboot a warm system. When i cooled down the highlighted part the boot started without delay.
Since the part has not type printed on it, i placed my question here, what part that is.
But diode is a little to less information to find a replacement part. It might be a shottky diode, a zener diode or a double diode.
Has anybody a link to a circuit diagram?

alexander77 · Post time 2024-07-08 12:19:54

Thank you very much!

341L · Post time 2024-07-09 01:05:17

Edited by 341L at 2024-07-09 01:08

alexander77 replied at 2024-07-06 00:33
The problem startet, when BIOS Information was lost. The battery was empty, but not 2V oe 1.5V, it w ...

I tried this one.