IT WAS TAKING ABOUT 5 MINUTS FOR PICTURE TO COME ON NOW NOTHING
I replaced the lamp in this about a month ago and it has been working great. About a week ago I noticed that it was taking about 5 minuts for the picture to come on, all the meantime I could hear the sound. Now the picture will not come on at all but the sound is there. I have looked at the lamp it looks fine also I can look through the back and see the lamp come on for about 2 seconds and then back off. Anyone have any advice. Thanks
Re: IT WAS TAKING ABOUT 5 MINUTS FOR PICTURE TO COME ON...
Please check the small caps that run off of the power source that
goes to your video in put, feel them with your hand, the bad ones
should feel warm which is then shorting the current from passing thru
to your supply branch, trace your schematic and you will see the caps
that are on that branch, I had the same problem took five min. for
picture to pop up. sound played good.
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well if you replace the lamp 2 months ago this could be a ballast issue go to your back of the TV and if you ear a weird mechanical noises like a tick,tick when you are down there this is the ballast.
Well I hate to be the bearer of bad news but besides the convergence issues you have a bad red picture tube. Us techs refer to your problem as a 'floating grid' in the red picture tube. More bad news is that the tube is no longer availible. The only solution is to have a professional remove the red tube assembly and ship it off for rebuild. A company called Video Display does this work reasonably and I've sent several to them with great results. It takes about three weeks and the whole repair is very spendy, around $400 to $500. Sorry for the bad news.
I've found the lines caused by the digital board before. Unfortunately it is expensive. I'd recommend running it on HD and it will bypass the faulty circuit. The lamp light flashes telling you the lamp is firing up. As the lamp ages, it will take longer and longer until it fails.
There is a list of things you need to check, but offhand I'd say that the 5 volt line is low and probably right on the"edge", which is why it works sometimes and not others take a look at this list: Cause #1 1. (Lamp may light and go out) suspect bad lamp part # 915P020010 2. Check for 12-volts DC at J-9 connector pin 4 on the Engine Driver PCB, if missing check for an open F9A09 on the Power PCB, if it is open replace F9A09 part # 283P127060 and the Light Engine part # 939P977010 3. (Lamp may light and go out) Check for 5-volts DC at J-9 connector pin 1 and 2 on the Engine Driver PCB if low or missing check C9A37 and C9A38 both 3300 UFD 10 V part # 181P732040 on the Power PCB (part # 930B921002) 4. At power on the lamp turns on and off three times and then the unit shuts down with a red lamp LED (lamp error). Replace the Light Engine part # 939P977010 5. Lamp enable line at J14 pin 6 does not switch to 5 volts after turn on, 12 and 5 volt supplies are good. Suspect the Light Engine part # 939P977010 6. Lamp enable line at connector J14 pin 6 on the Engine Driver PCB switches to 5 volts after turn on and does go to 0-volts (low) after 5 seconds, 12 and 5 volt supplies are good. Suspect the Lamp Power PCB (ballast) part # 939P978010 7. Lamp enable line at connector J14 pin 6 on the Engine Driver PCB switches to 5 volts after turn on but does not go back to 0- volts (low) after 5 seconds, 12 and 5 volt supplies are good. Suspect the Light Engine part # 939P977010
I would say try #3 first, the two caps on the pwer supply board. A couple of warnings: as always, unplug the unit before servicing. The power supply is located on the left side, if you behind the unit. It is in a shielded box and the shield has VERY SHARP EDGES so use care when you try to open it or you will slice your fingers. Please be sure to rate this solution. Thanks!
I had the same issue. Replaced the lamp and now mine is working. Normally this is a sign that the bulb is out, however - I would say now that either:
1. Your lamp is defective.
2. The balast in your TV is defective.
I would check out Discount-Merchant.com - they can help.