There's laptop repairing section, can I post there about the desktop motherboard repairing related queries too?
Please answer...
Please answer...
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Re: Where do I post about desktop motherboard repairing?
Who is the manufacturer and what is the model? Describe what are the issues with it. -
Re: Where do I post about desktop motherboard repairing?
The board is MS 7528. Version 1:0
It initially had bulged caps which I replaced when the board came to me. But the board wouldn't start. The 3.3 VSB at power switch isn't there, so I replaced the chip with another one and now board would power on. However, CPU won't get heated. I checked the upstream circuitry and found RAM Vcore voltage isn't being produced. The chip that's responsible for triggering the upper and lower gates of RAM power mosfets simply don't produce the necessary gate voltage.
I'm attaching the screenshot of that chip schematic.
I'm thinking once this chip triggers the upper and lower gate of RAM power supply MOSFETS, everything will be alright.
The boot voltage of the U1 chip reads 11.2 V.Attached FilesComment
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Re: Where do I post about desktop motherboard repairing?
Vref on pin 7 measures 1.8 V
VCC of the chip measures 11.95 VComment
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Re: Where do I post about desktop motherboard repairing?
A desk top and a lap top are two different computers . This forum does have sub sec. s for each . If some one does not provide an ansure hear .Comment
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This is a guide that I am writing for helping others to replace their MEC1503 EC chip if it breaks (or to get around an inconvenient prompt to the BIOS). This forum has been extremely helpful to me so I would like to contribute to help others. I will tell you right now that this task is very difficult to do. You MUST have experience and tools to do precision micro-soldering, BGA reballing, trace repair, and general laptop repair skills.
There are some specialty tools needed to do this task. The replacement MEC1503 chips can be acquired from Aliexpress. Do not buy the bare chips as... -
I believe Chip 2 is BIN is the main one as it contained the Windows product key, marked with XXXXX for now.
SN: PF3G1REP
MODEL: 20KW-00J1AU
PROBLEM: Turns on blank screen, charging circuitry motherboard looks good. I have tried another firmware here - but resulted in 5V will not go to 20v due to different PD firmware I believe - using the current firmware it does go to 20V.
Requesting a firmware clean/BIOS region cleaned. Here is output from ME Analyzer:
╔═══════════════════════════════════════════╗... -
This specification for the HP EliteDesk EliteDesk 800 65W G3 Desktop Mini PC can be useful for upgrading or repairing a desktop PC that is not working. As a community we are working through our specifications to add valuable data like the EliteDesk EliteDesk 800 65W G3 Desktop Mini PC boardview and EliteDesk EliteDesk 800 65W G3 Desktop Mini PC schematic. Our users have donated over 1 million documents which are being added to the site. This page will be updated soon with additional information. Alternatively you can request additional help from our users directly on the relevant badcaps forum....09-12-2024, 02:00 PM
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