BadBIOS/EEPROM chip

Crapacitance

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Join Date: Jun 2014

Posts: 2

Country: England, United Kingdom
#1

BadBIOS/EEPROM chip

06-23-2014, 07:47 PM

I badly flashed a BIOS chip. Bought a CH341A EEPROM programmer and 8 pin test clip, attached it to the chip on the motherboard and read it - returned values were all 00 00 00 00, attempted erase but when checking if it was blank I got an error message saying "The chips are not null", when trying to write the original BIOS.bin or anything at all to it I got "The chip and contents are in disagreement."
The program I am using is called "CH341A Programmer"

Is the EEPROM chip broken and needs replacing?
Can I force the chip to reset itself to NULL status, perhaps by shorting two of the contacts and applying power to the motherboard?
Motherboard is M2N68-LA Narra3 (Hewlett Packard)
EEPROM is Winbond W25x80VSIG (Phoenix BIOS)
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Agent24

I see dead caps

Join Date: Oct 2007

Posts: 4913

Country: New Zealand
#2

06-24-2014, 07:07 PM

Re: BadBIOS/EEPROM chip

You can reset the BIOS settings but there is no way to blank a chip without the proper command through the SPI interface.

I would suspect it may be because you are trying to do it while the chip is in-circuit.

"Tantalum for the brave, Solid Aluminium for the wise, Wet Electrolytic for the adventurous"
-David VanHorn
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BadBIOS/EEPROM chip

BadBIOS/EEPROM chip

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