BenQ DLP PROJECTOR PE8700 - Manual (Page 41)

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2. Main board trouble shooting:
(1) Main:
REMOTE
POWERON
OSD ok?
When no valid
signal
1. See CPU trouble shooting
U18, reset successful?
2. U17, RP25, RP24 OK?
3. CPU (U10) 56pin(IR) signal?
1. RP19,RP17,RP15,RP13
ok?
2. U19, U20 OK?
3. Check L8 with 100Mhz ok?
4. check L9 with 40Mhz ok?
OSD ok.
When input PC
signal
1.check J2
OSD ok.
When input
Video signal
1. RP1, RP2, RP3, RP4, R6
R3, R2, R4 ok? (SIL504
output)
2. check J2
Saving data in
EEPROM
NO
NO
NO
NO
NO
YES
YES
YES
YES
1.Replace U6 (EEPROM)
2.check R36 R37(IIC pull high
resistors)