Question about Proscan PS36800HR 36" TV

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TV won't stay on, cycles off and on continuously

After a power failure, possibly accompanied by a surge, the television will come on, but turns off, then back on, repeatedly. Occasionally it will stay on long enough to display a raster about 1/2" wide. It does this when any of the video inputs (component, vid1, vid2, etc) are chosen except the two VGAs. Then it remains on and displays "vga1" or "vga2" with a seemingly full horizontal scan. I've let it sit overnight, disconnected it from the surge protector, and tried different outlets. Any thoughts would be appreciated.

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You say that you disconnected your unit from the surge protector overnight. I assume it was hooked to the surge protector when the problem occurred? If so and based on the fact that you indicate that it is working on VGA1 or VGA 2 I would try replacing the eeprom. It would seem the most likely component and is certainly an easy and cheap solution to try. As techman said these sets are dangerous and you should not attempt this unless you are experienced with the proper procedures. Good luck.

Posted on Jun 23, 2006

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This coulkd be what we techs call a dog set to repair , as a surge can cause all sorts of problems. If your not a tech theres not just one part we can tell you could be bad but you also need to know how to test oit as these sets have no real user serviceable parts inside these sets. Also dont forget about the HI voltage these sets can store inside for a long period of time , even when they are unplugged. First thing that should be checked inside this set would be the main power supply. The fact that its trying to come on tells you i-ts probably not regulating or a short is preventing it to start up. Check all the error amp transistors as well as the referance IC. If you can get the power supply to come up with a variac. then check the verticle Output ic and see if you disconnect that if the su pply and the set starts up. If not then its most likely a problem in the HI vfoltage/sweep circuit and .or the scan power supply. This could be an easy repair but most times not. Good Luck

Posted on Jun 23, 2006

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My lg 50LN5200 tv won't turn on, a big storm turned it off. it won't turn on. What should I do?


large power surges (many times greater voltage than normal) usually accompany a utility power outage , this can and most times will take out a devices power converter rendering it useless , have a qualified tech have a look at it , see what he thinks could be failure

always try and prevent sensitive (and expensive) electronic items from being damaged in power surges by using a surge suppressors , some of these include insurance to repair anything that's plugged into them , and always replace surge suppressors every 3-5 years , they do wear out !!
some utility's have insurance that u can purchase(extra) from them to pay for any repairs this might cause in future , ck with them 4 this

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Possible bad internal power supply unit. Contact Sony if youre still under warrenty or a local repair shop. I had a similar problem that caused mine to blow out from a power surge.

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No picture or sound?? status light flashes in four blinking intervals. I was told it could possibly be the lamp it has never been replaced.


The STANDBY light will flash if an issue is detected within the television. This can sometimes be resolved by simply following the steps below to reset the television.
  1. Turn off the television.IMPORTANT: For a projection television that uses an internal lamp, wait 5 minutes after turning off the television to allow the lamp to cool before continuing with the following steps.
  2. Unplug the television power cord from the electrical outlet.
  3. Let the television remain without power for 60 seconds.
  4. Plug the power cord back into the electrical outlet.NOTE: If the television is plugged into a power strip or surge protector, remove it from the power strip or surge protector and plug it directly into the wall outlet. If the issue is resolved, the problem is with the power strip or surge protector and not the television.
  5. Turn on the television.

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