Troubleshooting - Toshiba 15DL72 Service Manual

4. TROUBLESHOOTING

4-1. No Power (No Video & No Sound)
CHECK/REPLACE
F801, L801, ADAPTER
CHECK/REPLACE
IC801
CHECK/REPLACE
Q801
CHECK/REPLACE
IC702
CHECK/REPLACE
IC704
CHECK/REPLACE
X701, IC701
N
IC801
N
Pin 1 = 12V ?
Y
Y
IC801
Pin 4 = LOW ?
N
IC701
Y
Pin 19 = HIGH ?
N
IC701
N
Pin 11 = 5V ?
Y
N
IC701
Pin 18 = HIGH ?
Y
N
IC701 Pin 13, 14
OSC O.K ?
Y
CHECK/REPLACE
SCL, SDA LINE
12Vcc = 12V ?
(IC801 Pin 5)
Y
5Vcc = 5V ?
Y
3.3Vcc = 3.3V ?
Y
IC201 Pin 34, 35
OSC O.K ?
Y
CHECK/REPLACE
IC201 (MXCS, MXSDA, MXSCL, MX_RESET),
IC400
Fig. 1-4-1
1-8
N
CHECK/REPLACE
IC803, L804, D802
N
CHECK/REPLACE
IC804
N
CHECK/REPLACE
X201, IC201