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You will need two adapters 24V and 12V. You can buy them from mpja.com. Do not buy anything from LCDPayless. They are crooks. I order power supply for Protron 32" and they sent me some garbage that is not working. I returned it and they refused to reimburse me full amount and then they claimed they didn't receive it at all. STAY AWAY FROM THEM THEY ARE THIEVES.
To my understanding, any power adapter would serve the purpose as long as the replacement adapter have the same specification as that of the original. Pls confirm, 100-240V 50-60HZ 3.0A max. output +25 6A +12 3A. The only limiting factor is that the plug/connector should fit the jack of the TV unit.
Having said that, then most electronics store would have a generic replacement. You can even look for replacement from computer stores. Over the counter sale would not need a PayPal account, and cash sale would of course not require a credit card. It would be to your advantage to bring along the original/defective with you to compare/as per sample.
If I understand your description correctly, you have two TVs that use the same model adapter, and both adapters have failed. In that case, I would suspect a weak design, or you may have put them in some place where they were overheated or zapped by power line surges. If it appears to be a design problem, you may want to consider using a substitute.
The adapter should have the output voltage and current marked on it, for example, 12VDC 2300mA would be a 12 Volt, 2.3 Amp output. The polarity is usually marked with a diagram showing whether the center in or hole in the plug is positive or negative.
You can use an adapter with the same voltage and plug style (including polarity) and the same or greater current output. If you find one with the right voltage and current, but the wrong plug, you may be able to change the plug. Just be absolutely certain you have the wires going to the correct terminals; reversing the polarity could damage or destroy your TV. Do a proper solder job on it; simply stripping the wires and twisting them on will not be reliable.
Sources for adapters include www.jameco.com and www.mouser.com.
Does it have a YHI power adapter or an internal power supply? The YHI type has a power adapter box with a low voltage cable that plugs into the TV. The internal power supply TV only has a power cord. email@example.com