Editing Atari 600XL General Maintenance (section)

== Common Failures ==
<templatestyles src="Template:StyledTable/styles.css" />

{| class="wikitable styled-table" style="width:90%; text-align:center;"
|+'''Common Atari 600XL Failures and Causes'''
|-
! Symptom !! Likely Cause !! Solution
|-
| No power / dead unit || Failed power supply, blown fuse || Test power supply output, check inline fuse if present
|-
| Blank screen on power-up || Failed CPU, ANTIC, or OS ROM || Reseat all socketed ICs; test with known-good chips
|-
| Garbled display || Failed GTIA, bad DRAM || Reseat GTIA; test/replace RAM chips
|-
| No sound || Failed POKEY || Reseat or replace POKEY chip
|-
| Keyboard completely dead || Failed CD4051 (U22/U23) || Replace CD4051 multiplexer ICs
|-
| Individual dead keys || Dirty membrane contacts || Clean with IPA; apply contact cleaner
|-
| Programs fail to load || Only 16 KB RAM (not enough) || Upgrade RAM to 64 KB
|-
| Cartridge not recognised || Dirty cartridge slot contacts || Clean edge connector with IPA
|-
| Intermittent crashes || Poor IC socket contacts, bad caps || Reseat ICs; recap electrolytic capacitors
|-
| Distorted or rolling video || Failed RF modulator or capacitors || Check/replace RF modulator; recap board
|}