Question about Hisense 55K22DG 55-inch 1080p 120Hz MHL & Roku Ready LED HDTV
SMPS start voltage section circuit has the problem. In most cases, it will be of start voltage supply resistor failure. Contact any service technician. The SMPS section circuit should troubleshoot. Electro help
Posted on Apr 02, 2015
The power button is digital these days. That is... it does not have the AC power directly connected to it. Like a normal appliance.
It's a Computer.
Nowadays, the switchmode power supply module converts the incoming AC power to the lower DC voltages required by the other circuit boards.
It uses lots of Electrolytic Capacitors to clean up noise in the DC power. But one Electro Cap is used to store a charge for turning on the switch mode power supply. Being Electrolytic they are prone to leaking & bulging so they don't do their job. They won't hold a charge. By pulling the plug and restarting, you have found a way to overcome the problem. But only temporarily. When the Cap goes fully bad, you won't be able to start the TV any more. Suggest you order a switch mode power module for it or take it to a tech who will replace the module. It's usually in a metal shielded small box full of ventilation holes.
I have repaired many switch mode PS but most tech's these days don't bother. They just get a replacement.
Posted on Apr 02, 2015
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Posted on Jan 02, 2017
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