TV sound but no TV picture...just very dark gray illumination with no image. No beeping sound when pressing ON button Visual inspection of the PowerSupply board reveals two caps near the 12V test point with bulging tops...however the 12V testpoint measures 11.9V. Test points labelled 31V measure ~.1Vdc and 66.6Vac...this seems wrong.
SOURCE: LNR-328W
90% of the time this is caused by a bad LCD panel. The other 10% is caused by a bad Main board. You may want to try and change the main board first. This set carries 2 different type of main board. You MUST look at your Version Number located on the side of the unit. (Version AM02 uses BN94-00667S.Cost $177.81) (Version 0001 uses BN94-00629R.Cost $176.14) LCD pane BN07-00194A Cost $806.49
Best regards
CircuitCity
SOURCE: Samsung LNR 328W TV turns itself off and turns itself back on
it sound to me like your power supplie is heating up and shuting down your power supplie is on its way out
SOURCE: I have a NS-LCD37-09 tv. No picture or backlight
Your main board is faulty. I've done several of these but haven't been able to figure out which component is actually bad these yet. I've simply had to replace the board itself, and it fixes it every time. One thing you can do to get your backlights to come on (and so you know I'm not Jive'n you) Is unplug the three wire bundle that spans from power supply to main board. This will usually make the backlights fire up. I even had one that after I left it that way for a minute (with the backlight on) it suddenly started working again! But this was short lived. :-(
One time I even tried recapping the entire main to see it that would fix it. It did not. I think it might be something to do with the small chip labeled SL37HA37. It's a 16 legged bastard near the 3-wire plug I told you to pull. It's that or possibly the bigger IC near it that has a heat sink on it. The ball grid array solder joints may be faulty. Just guesses, if any smart guys out there figure this one out, be sure to tell the rest of us please!
Thanks, Chris
Boise LCD
www.boiselcd.com
SOURCE: My TV is Zenith (LG
From the looks of it, it seems that you have measured the panel voltages. These are not even remotely connected to the problem. Your problem lies in the X and Y buffer boards which, when they go bad cause these false color images. There are 4 of them and it is highly recommended that all 4 of them are replaced, as one faulty buffer can take out the others. Together the 4 boards should run you about 150$. Let me know if you wish to replace them yourself.
SOURCE: Olevia lt42HVi Blue led goes out when power on,
The screen fuse probley blew so you should unplig it cause there's a possibility that it could catch on fire
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