Question about Samsung Televison & Video
When I turned it on I got no picture but do have sound. When testing voltages I get none of the high voltages on the PS board only the low voltage 3 volts, 5 volts and 15 volts. Can I assume this is the PS board failure?
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Posted on Jan 02, 2017
SOURCE: No picture on my samsung spn4235
On a plasma tv this is not good. It means a trip to the shop or replacement. Check for any warranty and have a good idea of what replacement cost is before you take it to the shop to get fixed. Get an estimate if you can.
Usually this problem means there has been a component fail on the main board.And normally that will be a $2 transistor that you will pay about oh say $75 for plus labour. A good shop should be able to find and fix it fairly quick.
Posted on Aug 21, 2009
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!
Posted on May 26, 2010
you can try this step.open the cover of your tv and have acces to the main board (CPU)during power on and no picture appears.press the small butoon found on the mainboard press it while the power is on this must reset everything on the CPU and powers the TV normally...let me know if this procedure work or have a rating to me with the thumbs up button. thank you!
Posted on Sep 30, 2010
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