Question about Samsung PS42P2S 42 in. Plasma Television
I have a tv that is a fiends that blew a main power supply fuse. I have replaced the fuse and now the relay operate and nothing will display on the screen except a very faint green glow. The menus wont work, it if their is a blown board but the problem is i wouldnt know where to start.
Kentg..aussie yeah .have the same model doing similar but makes a buzzing noise .i downloaded a complete w/shop manual for this and my tech mate is coming around home to check it out .will keep you posted .it is not advisable to muck around in there as there are some pretty high killable voltages in there.. send email address..
Posted on Feb 11, 2008
Could be bridge rectifier
Posted on Jan 10, 2008
You must start by checking the panel supply voltages, if you look on the panel inside the unit you should see a label with a lot of voltages on it, such as V-set, V-scan, Va, Ve, there are test points on the power supply board and DC _DC board, that has the test points and the small adjustors for those voltages, check and see if they are correct or not, then start unplugging the cables connected to the other boards and check all the voltages again, those supply boards have a latch on circuit that will cause it to shut down, if you have back lights though, it could be only a board swap, most of the time it's a logic board or main board or a Y-main board, but you poweer supply could still be defective, good luck
Posted on Apr 01, 2007
Tips for a great answer:
Here are some basic steps that will help you fixing the problem.
I'm assuming that your unit is dead set without an standby LED
light and your outlet is live.1.Power cord - check the cord it might be opened (no
continuity).This is due to frequent bending,pulling. 2. Power switch - check for dry joints, open contact. 3.Check the internal fuse-
sometimes the fuse fail because of the power
surge, replacing with new one will cure the problem, If this is the case I
would advice you to use surge protector/AVR (Automatic Voltage Regulator).
However if the fuse blew again this is an indication that you have a shorted parts in the power supply, you may visit the
linkhttp://www.fixya.com/support/r8053361-fuse_keeps_blowing for more info. If no reaction and
still the unit didn't power up then you have an open parts on the power supply.
4.If you see that the fuse is intact , don't attempt to touch anything
because there some fatalcomponents
stored electricity enough to hurt you with a simple mistake only. I would
advice you to look for a
professional to troubleshoot
the power supply. If you want to repair it yourself make sure that you have
necessary tools and test
instrument. First check bad solder joints(re-solder all
cold solder), leaky
electrolytic capacitor(sometimes it has bulged at the top but not all, you better
have a capacitor checker), open/shorted regulator transistor/IC(mounted in heat
sink), open fusible resistor (caused by shorted regulator
Transistor/IC), shorted zener
You may also replace the entire power supply board, click this LINK.
Hope I helped you.
Thanks for using fixya.
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