Elo TouchSystems ET1587C - 3. The data message could not be stored by E2 PROM

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least 3V), for the CPU to operate normally.
2. The OSD is malfunction
Re assembly
No
Check
if control keys are
pressed by F/C
Check
U101 Pin 9,10
Voltage will be changed
when press the
function
keys
No Check the tact
sw. soldring
Check
U103 pin 4, 9
B + = 5V
Check
U103 pin 2, 3
Data
Check
U103 pin 12, 13,14
15 Data
U103 Failure
Yes
No
Check U603,
V-OUT
U103 Failure
No
U702 Failure
No