Hi guys I need some help identifying this chip on the motherboard ? I cant find anything with the code printed on it.
SEE PICTURE.
Any help would be great.
SEE PICTURE.
Any help would be great.
Attached Files
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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... -
Hi ya folks,
I have this MacBook Pro A2485 (M1 Pro 2021) which came in for repair.
It had a shorted SSD power supply chip. Therefore it was stuck at 5V.
I replaced it and the SSD are fine. No more shorts.
But The mac still pulls 5V and 200mA. If i leave it alone for 5 mins, the mac manages to receive 20V and 40mA. Of course, which doesnt mean the mac starts after power meter reading 20V.
But while the mac is stuck at 5V, i checked the board with thermal and found this chip was trying to start. Chip picture is attached.
Chip marking... -
Hello,
I purchased a laptop that the previous user had tried to remove and replace a BIOS chip using a soldering iron not knowing that there is a ground pad under the 25R256JWEQ chip. In that process he damaged the BIOS chip and 3 of the resistors near the IO3, CLK, and IO0 pins. I have programmed a spare 25R256JWEQ chip using a CH341A programmer but not sure what values those resistors should be. If anyone has a boardview of this area and can provide those values that would be very useful for me.
Attached is the photo.
Thank you! -
Hi,
had T490 with faulty bios chip. Bought chip out of ebay and soldered on. Laptop starts and works however serial numbers of laptop and motherboard do not match.
I have updated laptop model number.
1) I did not find the way to update laptop serial number - I have this one.
2) I dont know where to get my motherboard serial number and how to update it. Is it somewhere physically on the mainboard? How do I update it?
Hope to find someone to help me with this as I am hitting dead end at the moment.
Many thanks
Miro -
Hello Everyone,
Needing to identify this chip which is near the USB ports on an HP motherboard. The marking on the chip is ahv31f.
It is completed shorted so I need to find a replacement. Thank you for your help!...
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