Toshiba HD-XA1KN Service Manual page 10

3-5. System does not run. ("WELCOME" displayed and key operation disabled)
START (5)
LED on FLASH ROM
module (PJ15) flashing
about 10 seconds after
power on?
Yes
Connector (PJ9) of
DVD drive and
power connector
connected
tl ?
Yes
Upgrade firmware again.
System is restored
after firmware
upgrade?
No
Failure of digital unit
No
No
Check PJ9 connection
and replace FFC cable.
Not
restored
Replace
DVD drive.
(A)
Yes
END
TP105(P5V) voltage
output correctly?
Yes
LED of FLASH ROM
module (PJ15) lights up after
replacement?
No
Restored
SO-DIMM module
(PJ1420) inserted
correctly?
Yes
Failure of digital unit
No
Power circuit troubleshooting
Yes
Upgrade firmware
again.
To (A)
No
Insert again or
replace SO-
DIMM?
To (5)