Question about Televison & Video
I have a jmb tv, when i turn it on it says scan do not tun off power, reaches 100% then starts over and is written upside down, takes several attempts of turning on and off before it goes
Just been told by the makers, its the power board that has an update chip onboard which should Not have been there.
Posted on Jan 29, 2015
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Posted on Jan 02, 2017
It's common for capacitors on the power supply board to go bad (tops will swell up) and cause the same problem. these new LCD tv's are all very bad when it comes to power surges.
Posted on Jul 21, 2009
Your power supply board is dead, u know basic electronics’ and soldering? Most of the times, the power supply board just have dead leakages gases capacitors.These capacitors always bulges up on it top,or puff up on it top.Replaced these gases leakages capacitors will get your TV power stable,and work again.Or tries websites like Shopjimmy.com,Ebay.com to buy a whole refurbish power supply board for the replacement.
hope this helps...
Posted on Jul 02, 2010
Check the main fuse in the power supply, the TV also has small surge protection devices (MOVs) installed after the fuse, any surges the come along and big enough will cause the main AC fuse to blow. When you surge protector, EVERY connections must go through the surge protector, for example, the AC cord of the TV is connected to the surge protector, the cable connection did not go through the surge protection, the surge then can get to the TV through the cables.
If you are going to DIY and have proper tools, electronics knowledge, and know safety precaution then please read on:
Please see my basic troubleshooting guide here:
Please post back what you find.
Posted on Jul 21, 2010
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I have had some problems with tvs taking a long time to start, turned out to be capacitors in the power supply. They leak, sometimes swell up. A kean eye may spot them. not a job for a vovice though.
Posted on Nov 19, 2010
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