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The POST error code 0175 refers to a CRC (cyclic redundancy check) reading from the EEPROM chip, that data is corrupted, most likely a faulty EEPROM chip. This is a motherboard problem and cannot be fixed except by a motherboard replacement. This is an old laptop and would not be worth fixing, I suggest you put your money towards a new laptop.
You can remove the hard drive and put it into an USB hard drive adapter case and use it as an external USB hard drive.
the crc is the cyclic redundance check your bios is corrupt. you will need to flash the bios to bring it back the internal bios bottery will need to be removed for 1 min then replace. it should bring it back if not you bios chip has burnt out. i have never replaced a bios chip but you will have to find one to replace it
Numeric error codes - ThinkPad General From IBM Web Site Notes:
· The most likely cause is listed first. · A numeric error is displayed for each error detected in POST or system operation. · In the displays, n can be any number
Symptom or error
Field replaceable unit or action, in sequence
Bad CRC1, stop POST task. The EEPROM checksum is not correct
This problem you may not be able to fix. There are a couple of things you can try.
1st Keep on rebooting your laptop until this error goes away.
2nd Replace the BIOS battery, it maybe nearly worn out. After replacement you need to go into the BIOS setting to set the Date & Time.