Samsung ln3251D picture problems

[TKF]

Has anyone come across this before,or have a fix for it, I have replaced the
t con board nothing changed, the video isn't effected doesn't seem to be a power issue nothing visible on boards could the main board cause and issue like this.

[Shinju]

Re: Samsung ln3251D picture problems

Do those dots pulsate/blink?

Need to get into the service mode and test agenst the test patterns.

[TKF]

Re: Samsung ln3251D picture problems

Do those dots pulsate/blink?

Need to get into the service mode and test agenst the test patterns.

Shinju Thanks for the reply not that I noticed, I know how to get in service mode but don't know what to do from there as far as the test to do Thanks for any help

[TKF]

Re: Samsung ln3251D picture problems

Further help needed I have tried a different T-con board no change tried different main board (presumed good) installed it and power on back light flashed on for 2 seconds and went off pull that board back out and reinstalled original then tested all voltage on P/B to Inverter and P/B to main board all looked ok except for pin #5 on cnm804 24v detect reads only 5.3v not sure if thats normal any help on what to check next would be greatly appreciated.

Link for PB BN96-03775A schematic I used for comparison
http://elektrotanya.com/?q=showresul...oria=&kat2=all

[TKF]

Re: Samsung ln3251D picture problems

Any more testing help would be greatly appreciated as stated above I replaced t con board tried a different main board got 2 seconds black not sure if that pointed to the problem or it was just a defective replacement board I reinstalled original main board could any components on the main board or inverter board be causing an issue like the one I'm having if so any help in troubleshooting those would be appreciated.
As you can tell by my posting I'm a newbie when it comes to TV troubleshooting and repair .