|
|
|
|
|
#1
12-07-2015, 10:17 PM
|
||||
|
||||
|
before you ordered the inverter...
DId you CHECK and see if it was getting its "must haves" from the signal board? The turn on command and the PWM signal for dimming ? you DID check and saw that the 24 volts was there I know...and did you see ANYTHING on the screen--if you shined a bright flashlight into the center of it--when the set is turned on? You PROBABLY have a bad inverter--but You DO need to check these things first...because if the signal baord is not providing it with what it needs--it will NOT come on...even a new one will not . 
|
|
#2
12-08-2015, 08:41 AM
|
||||
|
||||
|
Yes, the signal board was putting out a 1.0vdc command on power up, which when you look up the data sheet for the CCFL control chip, is exactly what it's looking for to start up. But the reason it never did anything is it didn't have the +5vdc VCC input it needed to operate, that went missing somewhere else on the board. I jumperd 5v from elsewhere and it instantly blew every SMD fuse, so I'm pretty sure it's shorted. The board is unrepairable anyway, and for $23 I can't really complain.
PWM was there as well. I don't think this is a main board issue, I'm sure the inverter is toast. Question is, was that the only board that let go?
__________________
Evolution... 
|
 |
| Thread Tools | |
| Display Modes | |
|
|
Hybrid Mode
