Turns off on its own with a pop sound and is blowing a fuse

Unfortunately plasma tvs are a lot more complex to service, instead of 2 or 3 boards there are a half dozen at least. I would guess when the main PS board went out it took some other boards with it. I don't have a manual for your set but I would look at the power supply sub boards, there generally are 2 of them, or on some models that is parts of the other boards. Generally there is a legend to see what voltages are supposed to be present at what places, samsung is good about making the test points on the boards. Also there are fuses on most the other boards and its possible one of those has blow, it won't be a typical fuse like your used to seeing, some are a small green component and some are white mini fuses...Good luck!

Was the TV on a surge protector? If not it likely the main circuit board is shorted out. Contact the local power provider and try submitting a claim for damage.

I've also had a popping noise on our 50" LG plasma TV, however the picture has not gone, but has turned grainy and colors are weird. Can this also be a blown fuse or a more severe problem (ysus board or similar)?

Sounds like a overheating issue. Try facing a large fan blowing across the back of the unit and see if this changes anything. If it does, it might help to blow the back out with compressed air as dust might be helping it overheat.

This sound is a capcitor pop and this could be in the power supply unit itself. The glass could be a fuse that took the brunt from the capcitor pop.

1. Unplug the unit and do not plug it in.
2. if its under warrenty take it in please!
3. if its not under warrenty and you know eletronics verify what cap popped and replace that and the fuse.
4. if you do not know about eletronics this work would cost you around $150 for the wrok done.

Good luck I hope this information helps you!!



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you have a shorted out power supply and probably some blown resistors

It is protecting you and itself with high probability.
Power supplies in modern electronic devices are designed to cycle if there is a fault in circuitry they are servicing and because of the design, also will not turn on completely if they are failing.

The older style of power supply was 'dumb' and unable to do this so could cause fires if the failure wasn't teh 'right' kind to blow the main fuse.

I agree with the manual; this is a job for a tech.

I know you already replaced the board, this is for future searchers. If you heard a popping sound, then the picture went out, there is a 32 pin Sanyo module that goes bad on the board. That's probably what caused the fuse to blow. Replace the module, then replace the fuse. The module is less than half the cost of a used board. Since this was a popular model TV, there are lots of replacement boards on the used market.

Your lamp has went bad and you need to replace it. If you look on the left side of your tv there is a sticker that has a lamp part number on it. You can order that from part store.com and you will be back up and running.

Josh

If your unit was blowing fuses you must have had an overload somewhere. Your post is not clear. Does your unit run ten minutes after unplugging and replugging it? If it does then there is still a partial short in it somewhere which causes it to shut down for protection. It could be anywhere. Some detail on what happened prior to the fuse blowing would be helpful for diagnosis. You do not sound like you would have the expertise to troubleshoot this unit. I doubt there could be much wrong with it and the cost should be minimal. Find a reputable repair shop to handle the repair. Good luck.