i have an inspiron 8200 that won't boot. this is what it does. with ac ps connected i get error message after the dell screen: WARNING: 70 Watt (20V,3.5A) AC adapter detected. System will not be capable of running in full performance mode without a 90 Watt (20v,4.5A) AC adapter. press F1 to continue. i press F1 and just get a black screen with a blinking cursor. on just the battery it just goes to the black screen and cursor. battery charges fine. computer passes built in dell diagnostics. can boot from the cd and used the ultimate boot cd. hard drive passes all tests thrown at it. did xp repair that went fine. cpu passes tests. i can read and access files on the hard drive. bios seems to report correct info, although even with ac plugged in the cpu runs at lower freq. tried disabling speed step. nothing helped yet. the only thing i noticed is that when i pull the main battery the time in bios resets to 00:00:00 along with the date resetting back to 2004. could a dead cmos battery be causing these problems?