MY laptop beep twice and flag error code Bad CRC1, stop POST task

0175: bad crc1, stop post task ,ibm t20

error en el post : 175 crc1 bad

You obviously didn't read the problem carefully. The machine won't boot, so there is no command line. I have the same problem with a T23. It might be the CMOS battery that needs to be replaced.

If it beeps (which it should) means that some device did not pass post. Find your motherboard online and look up the beep codes. This should help you to discover the problem. I hope this helps!

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

Error code
Symptom or error

Field replaceable unit or action, in sequence
0175









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.
System board

Error code Symptom or error Field replaceable unit or action, in sequence 0175 Bad CRC1, stop POST task. The EEPROM checksum is not correct. System board

Go on tis forum and post your problem. There is also the Lenovo forum. I have a T23 and haven't seen this error before. These Forums are very good for information on your laptop.

http://forum.thinkpads.com/viewforum.php?f=28

http://forums.lenovo.com/lnv/board?board.id=T_Series_Thinkpads

sounds like cmos battery flat small battery inside pc to retain cmos setting when pc switched off

There are a couple of possibilities, go to this link for the solutions, but it could be a bad power supply http://www.hardwareanalysis.com/content/topic/31761/