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Level 3 Repair
8-3-8. TSP
Touch Screen does not work
Check the connection of
HDC500 / LCD Module zip
Check the Voltage on C459
Check the Voltage on R500
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Yes
connector
Yes
= 3.3V
Yes
= 1.8V
Yes
Check the I2C signal
Yes
Replace LCD Module
Yes
END
No
Reconnect the HDC500 / zip connector
No
Resolder or Replace C459 / U400
No
Resolder or Replace R500 / C541 / C540 /
No
Resolder or Replace R304 / R305
8-20
U509 / UCP300
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