Rant: spent 6 hours chasing a random shutdown on a Dell Optiplex and it was a $2 CMOS battery

Harper Perry · 2026-09-26T21:30:03.117361+00:00

Kept swapping RAM sticks, reseating the CPU, even flashed the BIOS twice before I thought to check the coin cell, and I used to tell new guys those batteries only cause clock issues, so has anyone else been burned by a 'that can't be it' part?

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Rant: spent 6 hours chasing a random shutdown on a Dell Optiplex and it was a $2 CMOS battery | Computer Technicians - Rigidtalk