Posted 21 June 2010 - 07:40 PM
I have changed the LCDs on two different Dell laptop models (one a 1500 and one studio 1535). After changing the screens (one change was bot the inverter and LCD, the other just the LCD) I get the message "Warning: The battery cannot be identified. The system will be unable to charge this battery. Press any key to continue." Windows does not see the battery either. The battery does in fact seem to be charging, as if the AC adapter is pulled the laptop will continue to run. I traded known-good batteries into the systems and got no results. Other fixes I have tried without success:
Hard power reset (Boot system, pull AC, pull battery, hold power button for a minute, replace everything)
Booting computer without the battery installed, then replacing
BIOS reset (pull CMOS battery and main battery for 15 mins)
BIOS update: I couldn't achieve a successful BIOS update because it would not continue without both AC and battery power, and the system doesn't think it's on battery power.
I called Dell tech support and they had me run system diagnostics which came back with a failed inverter on the system it was replaced in. We replaced the inverter a second time and it failed again. Dell says the inverter is to blame.
I can't fathom the connection between the two parts, has anyone run into this problem, or have a guess on how to fix it?