New
#1
Can't boot or repair Win 7 after replacing CMOS battery
I apologize for the length of my post, but I have gone thru several steps in trying to solve my problem.
I turned my Win-7 PC on and got the error message "CMOS/GPNU checksum bad".
Research suggested one cause might be the CMOS battery (#2032), which I replaced. I entered BIOS and everything looked good except for the date/time, which I reset. I then rebooted and got the error message "invalid partition table". At that point I inserted my Win-7 installation DVD to try and repair my installation. Unfortunately, no OS was found on the hard drive. So I selected the option to re-image (using a fairly recent system image stored on an external drive). After about an hour, the process was finished and I got the message that the restore was successful. A system restart was then required, but it was not successful....I once again got the error message "invalid partition table".
I also got the message that the reason that the startup repair was not successful was because 'no OS found on disk".
Any help/advice would be appreciated. At last resort I could try a complete reinstall of Win-7 but I would probably lose a lot of data that I had been backing up via the system image.