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Lenovo c40-05 eprom chip - Lenovo Computers & Internet

Posted by Craig Reimer on

  • Brett Duxbury
    Brett Duxbury Mar 07, 2016

    Hi Craig Reimer, we want to help you with your question, but we need more information from you. Can you please add details in the comment box?



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I'm having trouble removing a bios password from my latitude d631. I tried removing the battery for a few hours, and dozens of default master passwords. Nothing's worked and this is alot of trouble just to...

there are a few options, if there is no small battery on the motherboard you can either replace the eprom chip or do a paperclip trick. on ebay there are password removal sellers for around $20
sometimes they can help , but it sounds like its locked in you eprom the paperclip trick involves removing the motherboard and powering on the laptop while jumping the pins on the eprom chip with a paperclip.

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That's a chance you take whenever you flash an eprom. "chip". The only thing that you can do is send it out to one of the numerous companys on the net that fix that sort of problem. Or buy a replacement eprom chip. There is no other solution the chip is now corrupted. You can try to roll back the rom if the machine wouuld boodt but otherwise yu are out of luck,sorry,

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Hi there.
EEPROM stands for Electrically Erasable Programmable Read-Only Memory. An EEPROM is like an EPROM chip since it can be written in or programmed more than once. Unlike the EPROM chip, however, an EEPROM chip need not be taken out of the computer or electronic device of which it is part when a new program or data needs to be written on it.
The BIOS is the EEPROM chip, so you have to note what BIOS version it is AMI, Pheonix for example, this chip is located on the laptop motherboard and will be clearly marked.

Good luck and thanks for using FixYa!!

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