UMC S15 LCD TV Picture fault

007neutron · 09-04-2009, 06:45 AM

Hi, could anyone please help me, I have a UMC S15 LCD TV which works fine for a while then the picture will go off just leaving me with sound, I can disconnect the power for a while and all is fine again until it decides to go off again.

If anyone could help me with a solution to this I would be extremely grateful.

Thanks in advance.

**Done_Fishin** · 09-04-2009, 12:02 PM

Sounds a lot like your inverter is failing and/or the backlight is going off. Shine a light on the screen from an angle and see if the picture is there but just not being illuminated.

A light is shone from behind the panel to allow us to see picture content. However the lamp is not always directly behind the screen but in many cases there are a couple of lamps at the top and bottom of the screen behind metal covers. Tampering with these when you don't know what you are doing could mean a total write off, so be careful.

The loss of illumination could also be because of a faulty power supply or a faulty inverter board. Regardless of which it is, it's a job that requires great caution and should be done by someone with a lot of Electrical / Electronic experience.. there are lethal voltages inside electrical / electronic equipment .

09-04-2009, 06:45 AM	#1 (permalink)
007neutron Registered User Join Date: Sep 2009 Posts: 1 OS: xp	UMC S15 LCD TV Picture fault Hi, could anyone please help me, I have a UMC S15 LCD TV which works fine for a while then the picture will go off just leaving me with sound, I can disconnect the power for a while and all is fine again until it decides to go off again. If anyone could help me with a solution to this I would be extremely grateful. Thanks in advance.

09-04-2009, 12:02 PM	#2 (permalink)
Done_Fishin Moderator Hardware Team Join Date: Oct 2006 Location: Brit living in Greece Posts: 7,505 OS: WinME, WinXP Pro SP3, Win7 Beta, Ubuntu 9.04 & Netbook Remix & CD2USB, Mepis 6.5, Fedora 10 My System	Re: UMC S15 LCD TV Picture fault Sounds a lot like your inverter is failing and/or the backlight is going off. Shine a light on the screen from an angle and see if the picture is there but just not being illuminated. A light is shone from behind the panel to allow us to see picture content. However the lamp is not always directly behind the screen but in many cases there are a couple of lamps at the top and bottom of the screen behind metal covers. Tampering with these when you don't know what you are doing could mean a total write off, so be careful. The loss of illumination could also be because of a faulty power supply or a faulty inverter board. Regardless of which it is, it's a job that requires great caution and should be done by someone with a lot of Electrical / Electronic experience.. there are lethal voltages inside electrical / electronic equipment . __________________ . . I'm not old!! I'm age impaired .. D_F I DON'T PLAY GAMES How to mark your thread as solved HDD DIAG UTILS TSF's Photographer's Corner Last edited by Done_Fishin; 09-04-2009 at 12:03 PM. Reason: typo's