I have a ThinkPad T14 which always finds an error at a very specific address during a RAM test. I therefore believe that exactly one of the RAM chips on the mainboard is defective. How do I find this defective RAM chip?
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Common SPI bios chip programming Questions and Answers
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Q: I have a bios request,i can`t post my backup as i can`t read from the chip.
A: If you can`t read from it how do you expect to write to it ?.
Q: Why is my bios chip unreadable ?.
A: The programmer is faulty or has a worn or broken zif socket.
The USB cable is frayed,connector pins worn or some other physical damage.
Not enough amperage or voltage to power the programmer properly.
Bad...09-02-2021, 04:40 PM -
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 can't find the datasheet for this chip's schematic. Can someone with information please answer?... -
Thanks for any help. The board version is DAZAARMB6E0 REV: E. The bios chip is winbond 25Q64JVSIQ1736. W25Q64JV is not available in AsProgrammer -- only BV CV FV or FW_1.8c. The chip won't interface with asProgrammer and a CH341A. When I have this chip on the board, the laptop will not post but when I plug it in to power, the blue LED lights up, also the orange when the battery is connected. When I push the power on button, keyboard backlight turns on and the fan starts briefely then turns off. But I can't do anything to program this bios chip so I bought another one.
The BIOS... -
Hello! I saw on my motherboard DAG77MB18C0 rec C that I have a burn chip and I also found a similar one in good shape but I am having troubles recognizing and finding it online in order to replace it.
What I can read is: DN46AP 22cf 1000 and Gemini is telling me it is a MOSFET by On Semiconductor model NVMFD5c466n
Do you think this is real ?
The laptop is still starting but I dont want to use it until I replace that. Based on the images, do you think I will succed with a profesional electronic technician?
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