My TV has started going to a black screen every once in a while. You can still hear the sound but the image goes dark. Once in a while it will come back or we turn the TV off for a few minutes and the image will return. Can you recommend a fix or replacement parts?
Back - light problem. Check and replace damaged component/s at its back-light inverter board, or replace this board as card basis. If you wish to get some details; check the site linked here. Surf the site with patience. Pull up older posts. It will be best to replace the inverter board as card basis.
http://electronicshelponline.blogspot.com/
In some models of LCD TVS; the backlight inverter and its T'Con board will be a part of the panel itself, and will be a built-in type inside the LCD panel. If so, they can't be replaced. In this case; a panel replacement is the only repair. For some other models, the backlight inverter section circuit will be a part of the main power supply regulator [SMPS]. To such sets, the power supply section circuit too should trouble shoot. Contact any service technician. The circuit will differ with models and versions.
SOURCE: image is grany every time tv is cold.
I had the same problem. Except mine never got better after the tv warmed up. I fortunately I still have my manufacturers warranty and Samsung sent a guy out within a few days. He replaced a few parts which really didn't do anything. However what he did that was interesting was on two circuit boards. One on the mid left and the other on the mid right. Apparently there is a nob or something he tweaked on each panel that cleared the grainy image right up. What he told me was that the it is basically pixels that are not turning off in sync. adjusting the two circuit boards syncs the pixels to turn on and off at the same time.
SOURCE: Screen Problem
I have been trying to fix one of these tvs and found out from a repair man that the lower half going blank means a problem with the lower buffer. and that is also what the manual I downloaded says.
have you checked that?
SOURCE: screen turns black after a few seconds
Check the software and if is is not BX23U-1.5.0.0_03531 upgrade it by downloading the software from www.p4c.philips.com onto a USB stick. If that don't fix the issue change the small signalbaord.
SOURCE: The screen of my LTN1535 goes back after a few
It can be the backlight inverter board is bad, or it can be as bad as the lamps also, also check power supply section for bad capacitors.
http://en.wikipedia.org/wiki/Capacitor_plague
SOURCE: a black image appears and goes away every once in
When you have video display problems such as shadows and lines that go away after warming up, or come and go during viewing, it is usually the LVDS cable and T CONN board going bad. The screen can have one of the following or combinations of blurs, different layers of brightness and lines. It could be the backlight but most of the problems with the LNT4661F have been this.
I had the shadow and line problem and replaced both the cable and board for $120 and that fixed my problem. The TV was only 18 months old. Since I had the TV apart, I went ahead and replaced the capacitors on the power supply board so I wouldn’t run into the clicking problem that also affects this model TV. You can find the parts numbers for the LNT4661F cable and board below. You can find links to YouTube ( Part 1 & 2) to show how to replace the capacitors. Good luck.
Samsung A/S-T CON BOARD BN81-01312A
Samsung Lead Connector LVDS BN39-00883A
YouTube (Part 1) http://www.youtube.com/watch?v=Mm51C_RDIZE
YouTube (Part 2) http://www.youtube.com/watch?v=BNHHrgX_6cs
80 views
Usually answered in minutes!
×