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U59 with a termal problem

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Post time 2024-07-02 00:52:11 | Show all posts |Read mode
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
U59 Mainboard3.png
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Post time 2024-07-10 10:34:27 | Show all posts
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.
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Post time 2024-07-08 11:25:05 | Show all posts
Hi there,

It is BAT54C DIODES
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Post time 2024-07-02 14:12:51 | Show all posts
Hi there,

The marked part is diode .
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 Author| Post time 2024-07-02 15:25:24 | Show all posts
Thank you! Do you have more information, just a regular bipolar diode, a schottky or at best a type like bav99 or so?
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Post time 2024-07-05 09:23:57 | Show all posts
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 ?
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Post time 2024-07-05 21:14:38 | Show all posts
I have the same problem. If you cool the area on the board shown in the photo, the computer starts up immediately.
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Post time 2024-07-05 21:20:27 | Show all posts
This component on my motherboard is marked 5C. This is either a pair of diodes or a PNP transistor.
5С.jpg
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 Author| Post time 2024-07-06 00:33:48 | Show all posts
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?
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 Author| Post time 2024-07-08 12:19:54 | Show all posts
Thank you very much!
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Post time 2024-07-09 01:05:17 | Show all posts
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.
alt.jpg
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