Lenovo c40-05 eprom chip - Lenovo Computers & Internet

try the speed shops for chips for ECM

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.

I’m happy to help further over the phone at https://www.6ya.com/expert/eric_ab7c09ec01841771

The software in the BIOS is stored on an EPROM (Eraseable Programmable Read Only Memory). So, buy some hardware, namely an EPROM writer, remove the EPROM chip from the motherboard, insert the EPROM chip into the EPROM writer, download the latest BIOS-software from IBM's web-site, and load the software onto the EPROM writer, and rewrite the software onto the chip. Remove the chip from the EPROM writer, and reinsert it into the IBM motherboard.

Try opening it and taking out the little coin battery from the moatherboard for about 20 sec or more..put it back in and see if this works first....if it doesnt im not sure you can ...but let me know if this helps!!!

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,
Gym

When you locked a tv you need the password, if you not get it, you will have replace the Eprom chip whith another recorded Eprom chip in acorded whith the tv model number.

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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They seem to deal alot of these, maybe they have what you need.

it could be a ghost but most likely a bad solder connection , crystal(controls the eprom)(menu chip) , or the eprom chip itself will need to be replaced

Instructions for resetting the T60's passwords can be found in the Hardware Maintenance Manual, which can be downloaded from Lenovo's website at http://www-307.ibm.com/pc/support/site.wss/document.do?sitestyle=lenovo&lndocid=MIGR-62733