Sony KDL-32EX400 Service Manual page 12

Since the diagnostic results displayed on the screen are not automatically cleared, always check the self-diagnostic screen.
After you have completed the repairs, clear the result display to "0".
Clearing the Self Check Diagnostic List
1. Error history and Error count : Press the Channel 8 => Channel 0 .
2. Panel operation time :
Exiting the Self-diagnostic screen
To exit the Self Diagnostic screen, turn off the power to the TV by pressing the POWER button on the remote or the POWER button on
the TV.
Press the Channel 7 => Channel 0 .
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SELF DIAGNOSIS FUNCTION
KDL-32/40EX400(HK/WB/GA)