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My magnavox 20ms33r keeps turning off the panel lamp stays on but the screen goes off, when I turn the set on then off it comes on for a short time but will not stay on

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Sounds like 2 me youve got a picture tube probly going bad,, thats usally the case,, good luck

Posted on Oct 05, 2008

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its either a bad door switch,or could be the dome override switch by headlight switch,or your interior light switch is all the way up

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I have an idea that your power supply has failed

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My magnavox 42mf438b lcd tv will be fine for about 10 minutes when i turn it on, then the screen goes completely black but it still has sound. it stays like this even if i turn it off and back on. i can...


that set is highly rated by users .. it first came out in early 2009 (i think) so you might check to see if any warranty remains ... the display is illuminated by several lamps .. each lamp has its own high voltage inverter .. all the innverters are powered by an output of the low voltage power supply (often 18 volts)... i would suspect a problem with that low voltage power supply.. either a bad capacitor or a thermal issue .. .. ..

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Monitor comes on for a split second , and then off


Most common failure in the LCD monitors are bad capacitors (bulging top/seal or leaking) in the power supply, failed inverter circuits (blown fuse, shorted transistors, shorted/open transformers), bad lamps (poor solder connections or worn out lamps). You will need to open it up and inspect the inside, see example of failed Dell monitors to get some ideas what goes wrong: http://s807.photobucket.com/home/budm/allalbums
Post back what you see inside so we can guide you further.

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I have a kdf-50e2000. when i turn on the power the green light comes on then goes off and red light comes on blinks 3 times on power and screen stays black. changed lamp and reinstalled(just bulb). picture...


Check the lamp door switch. This switch is really cheaply made. The switch is not available. short rhe wires to fix the problem. then never change the lamp witout unplugging the ac power in the future.

Oct 30, 2009 | Televison & Video

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Screen come on then goes black


The most common problem. It is related to old backlight lamps. The best solution is to replace them, but if you don't care a lot about total brightness, you may simply replace faulty lamp with 27pF 3kV capacitor, soldered across the high-voltage connector. That would be equivalent load for the inverter.
First of all, you need to find which lamp causes that problem. Disconnect flat cable from the display so all backlight will go through the screen. Now, using that 27pF capacitor replace lamps one by one and check when the light will stay for longer time. Keep that configuration as temporary solution, but make sure you will isolate your capacitor well, 'cause there's about 1000 volts applied to it.

Sep 12, 2009 | ViewSonic VA720 17" LCD Flat Panel Monitor

1 Answer

Hp flat panel monitor comes on shows logon and then blank screen


Ok, another words, monitor powers up for few seconds and shuts down by itself. If green LED on the front panel turns off as well or stays on?
If stays on, then inverter turns into protection mode because of old backlight lamps.
If it turns off in same time with an image on the screen, then there are some bad electrolytic capacitors in the power supply.

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CVizio 32" background lamp won't stay on


Ur backlight inverter ic board is dead must be replace.

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Sony KF-60WE610 Screen and Sound On/Off


All symptoms in your TV shows that you need to replace its Lamp as it has been consumed its life hours and TV requires new lamp. Lamp can be obtained from Sony Website. Price is $200, Hope this info will help you to enjoy your Sony TV in coming days.

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Problems turning my tv on, need to try several times


I just recently had the same problem and finally my set would no longer turn on. I replaced the projector lamp and now my set works. However, when it first comes on, it only stays on for about 2 minutes and then goes off. After another minute, it comes back on and works fine from then on. I don't believe this double power up can be any good for the lamp, but I don't know if the problem is the lamp or the set. These lamps run on about 65 volts, but require a short blast from 5000 volt source to fire up. At $200.00 a lamp, I don't want to go buy another!

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