Lenovo 7781 i3 PC Power Supply Fan Replacement & CMOS Battery Replacement. System blow-out starts at 3:21
CMOS battery tests and replacement start at 5:00
Fan replacement and computer rebuild starts at 9:08
Two repairs of a Lenovo 7781PC: The computer was losing its date and time, so a new CR2032 CMOS battery was fitted. The fan PSU fan was also making a horrible sound, which meant it had to be replaced. Replacing the fan meant stripping the computer and rebuilding it because of the PC's small form factor.
Tags: Lenovo 7781 i3 PC Power Supply Fan Replacement & CMOS Battery Replacement, Lenovo, PSU Fan, CMOS battery, Replacement, Rebuild, Date problem, PC Rebuild, Fan noise, Faulty PC, 7781