Has sound but no picture. I have the back of the tv off and just need some advice on what to look at first.
Chances are its the capacitors on the power supply that power the inverter the one that goes bad is a 470uF 25v. you'll have to remove it and test it with multimeter. set meter to 500mp if you have a meter that has that option and touch pins on capacitor and give it a second the meter should go up to around 470 if not its bad and should be replaced
.48$ at radioshack but they dont stock it so you have to order it.
Testimonial: "Wow thanks for the super fast reply. I'll start with the capacitors. Thanks!"
So, I located the 470uf 25v capacitor and tested it. It tested positive as well as all the other capacitors. What next?
So I located the 470uf 25v capacitor and tested it. It tested positive as well as all the other capacitors. What next?
this ever figured out?
this ever get figured out?
×
SOURCE: samsung lnt4065fx/xaa with 100's of colored lines
Sound like one of two things: A test screen, or a broken TV. More likely than not, your television is broken. Try hitting TV/Video on your remote, and if that doesn't work, power the TV off, unplug it, and plug it back in. If none of the works, it's time to call a repair man.
SOURCE: samsung lns4095dx/xaa after 30min the screen goes
The first place to start is with the Main bd. The second cause would be the T-con bd. Have a trained Samsung tech troubleshoot to find out and repair the set.
SOURCE: Tv has no picture
I have the same issue. I am going to replace the main board and then see what happens. the part number for the board is BN94-00629F if you want to try and find one.
SOURCE: HPT5054 50 in. HDTV-Ready Plasma Television: Samsung HPT5054X/XAA - No picture, Sound OK, Have ...
It's not the x main. 90% of the time it's a y buffer that goes out. It's usually the top buffer. 3/4 of the time the buffer takes out the y main board too. You cannot just replace the y-main or buffer because it will just burn out the other within seconds. Also about 1/4 of the time it'll take out the top transformer on the power supply too. The solution? First disconnect the power to the y main board. turn on the television and check the voltages coming off of it. Careful it's high voltage 208V! Remember it's DC too. Then disconnect the buffers from the y main board. You can try powering the y-main up to see if the little LED lights up. This does not indicate it's working though but it'll tell you if it is possible to fix. The fixes for these boards is only for electronics guys. It usually involves replacing 1-3 capacitors and 1-4 FET's. Since a bad buffer can take out a good y main in seconds it's usually recommended that one replace all 3 boards at the same time. It's a $250 fix. How do I know all this? I've now repaired 5 of these televisions. I owned one and spent close to 600 repairing it. I bought misc parts and broken sets online for months before I had 2 different repair guys walk me through the process of repairing them. I had so much cash tied up in parts that I bought 3 more dead sets and repaired them to justify all my spending. I've never had an x board fail. I've had EVERY top buffer fail. I've had all but 1 y-mains fail. and 1 lower buffer fail. I've also had the y buffer fry it's top chip, blow a capacitor and FET on the y-main, and fry the top transformer on the power supply before my eyes. It only took 5 seconds. Replacement of the 3 y boards will almost always fix the sound but no picture problem. Hope this helps!
1,158 views
Usually answered in minutes!
×