Symptom Detailed information on removing CMOS Battery FRU 02K6502.
Possible 600 post errors that indicate CMOS (real time clock RTC) battery should be replaced 0161 Dead Battery 0173 Configuration Data was Lost 0192 Fan Error
Affected configurations All TP 600, 600E, 600X Systems (2645XXX)
Solution Remove and replace the CMOS battery.
Caution The backup battery is a lithium battery and can cause a fire, an explosion, or severe burns. Do not recharge it, remove its polarized connector, disassemble it, heat it above 100°C (212°F), incinerate it, or expose its cell contents to water. Dispose of the battery as required by local ordinances or regulations. Use of an incorrect battery can result in ignition or explosion of the battery.
Loosen screw 1.
Lift DIMM door off.
Gently pry battery connector loose with a screw driver.