Question about Samsung HPT5054 50 in. HD-Ready Plasma Television
Bought used last week, used no problem for 20 hrs. Then no vid. Sometimes when turning on I see a very brief flash, sometimes just black. Hooked up a DVD player - audio but no vid. As I've not used a DVD player before, I assume the vid part was active while the audio ran. Hard to see what's going on when there's no vid. Also started the TV not attached to anything. No display menu. Nothing. Anyone know the next step? I could remove the back panel... but I'm really not a technician.
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Posted on Jan 02, 2017
its the lower buffer card.. (y buffer lower board) they cost about $90.. i changed mine myself on my samsung hpr-4262 42 inch plasma.. pretty easy,, took approz 20 minutes.. the card has 3 ribbon cables and 3 other connectors and 1 screw.. removing all the screws out of the back pannel took the most time.. i found the repair manual for my tv on line for $13 (download PDF file) the manual had a trouble shooting section and what board to replace for each problem.. got the manual from here http://store.payloadz.com/ ordered the replacement board from www.partstore.com
Posted on Sep 24, 2008
Program the RCA remote with the instructions below, this will tell us if the problem is with the remote or the tv.
Posted on Jan 27, 2009
One of your transformers on the inverter board are failing to sustain regulated power to the florescent lamps resulting in a dark picture. Also check the SMD fuses on the inverter board(s) see if they have blown. You will need a continuity meter to check them. You can get one from radio shack and be sure to get one with audible sound....you don't have to replace boards when you can fix them.
Posted on Jul 10, 2009
SOURCE: Samsung LN-R408D - No Picture
My Mom's LNR408D also had sound but no picture. I was able to fix it by soldering in a jumper wire across a blown (1.5A ???) SMD picofuse on the "T-Con" board.
Consider attempting this ONLY if you: 0) Know enough to avoid the potentially fatal High Voltage parts of the power supply board!!!
1) Are a fearless hackazoid 2) know what you're doing with a soldering iron and teensie SMD parts 3) are gonna throw the busted thing out anyway so you have nothing to lose and won't be sad if you screw something up.
4) Know enough to avoid the potentially FATAL High Voltage parts of the power supply board!!!!!
This board is at the top center under a close fitting RF shield. The suspect part was labeled "CP" on the board and marked with "P" on the part. It is visible above the right-center of the connector from the main board. An ohmmeter showed it as open, so I bypassed it with a jumper wire from connector VIN to the hot side of C13. One image shows the suspect part and the jumper in place.
The other shows the TCON board placement top-center (under its RF shield). With care, it seems possible to test the fuse and put the jumper in place without removing the shield. (Obviously don't touch anything else with the VOM leads!)
Thanks to ZORBUS and Steve's TV and Electronics for the idea.
Posted on Sep 22, 2009
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