How to troubleshoot the power supply of the tv when there is no power

If your Hisense 55-inch 4K TV with Android is turning off randomly, and you have found that the power supply board is wet, it is likely that the issue is caused by a problem with the power supply. Replacing the power supply board may resolve the problem, but it's important to consider the following before making a decision:
Safety: If the power supply board is wet, there is a risk of electrical shock, so it is important to make sure that the TV is unplugged and that you take appropriate safety precautions before handling the power supply board.Root cause: The problem could be due to a leak or another issue that caused water damage to the power supply board. If the root cause of the water damage is not addressed, the new power supply board may also be damaged.Difficulty: Replacing the power supply board can be a difficult task, and it requires some technical knowledge and the right tools. It's important to make sure that you are comfortable with the task and that you have the necessary tools before attempting to replace the power supply board.Cost: replacing the power supply board may not be a cheap solution, and it may be more cost-effective to consider a new TV.It's important to have a professional technician to check the TV and confirm if the power supply board is the issue and if it needs to be replaced.
If you're not comfortable with the task of replacing the power supply board, it's best to contact Hisense support for further assistance or have a professional technician to check the TV.

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Check the tv power supply board.That the board where the tv power A/c plug into it.Check the tv power supply board carefully for dying components parts that are called capacitors parts.Bad or dying capacitors parts on the tv power supply board are alway causes this problems to the tv.Bad or dying capacitors parts are very easily to spots,all these capacitors parts are alway bulges up onto it tops.Never have plats round tops as they suppose too.U have all the tools and know basic electronic also can do basic soldering work,u should changes all these dying capacitors parts in the tv power supply board with no problems at all.If u check all over the tv power supply board and it have no dying and leaking capacitors parts to the tv power supply board all.Then the tv Y-Sustain main logic Tuner board it is the causes and the problems.The tv Y-Sustain main logic Tuner signal board that is the board that take in the tv imcomming tv broadcasting signal cable plug into it.Or tries websites like Shopjimmy.com,Ebay.com to buy a whole new refurbish tv power supply board and or the tv Y-Sustain main logic Tuner signal board for the replacement.

The tv before,the tv power supply board already have problems and was slowly dying,that why it require u to pushes 5 to 7 times for the tv power supply board to be able to sustance and hold power for the tv.Now the tv power supply board it is alot weaker or already dead.That why the tv dose not power on anymore.The tv power supply board that the board where the tv power a/c cord plug into it.Try website like Ebay.com to buy a whole new refurbish tv power supply board for the replacement.

In that case the problem of your television is the power supply.The power supply have low voltage output so that the board of your TV cannot drive,so that the TV wont turn on.The power supply have leak capacitor that may cause of abnormal voltage.The output voltage of the power supply is +5V, +12V, and +24V.So the power supply is the problem its need to repair.Thanks

Now,there is no power to the tv at all?Yes.Tries tv unplug,replug it back like about and hour later.That the resetting tv back to the factory setting.The tv now should be working again.If tv still have the same result,tv power supply board have problems,that the board,where the power a/c cord plug into it.Check the tv power supply board fuse,because u lost main power to the house.If u lucky,the tv power supply board only have a dead fuse,fuse is near where the power a/c plug,plug into tv to get it power.Fuse can buy it anywhere like Radio Shack like $1.50.After u repalced the fuse,if tv still getting the same result,than sorry ur whole power supply board have problems and it is dead.Tries websites like Shopjimmy.com,Ebay.com to buy a whole refurbish power supply board for the replacement.

Ur tv power supply board it dead.The power supply board,that the board the a/c power coard go into it,that ur tv power supply board.Tries websites like Shopjimmy.com,Ebay.com to buy a whole refurbish power supply board for the replament.

The power supply board is gone. You can get parts from here: TV Parts Universal TV Stands DLP Chips ShopJimmy

tv goes into standby all the time if a power supply is not fine, what happens is that a power supply produces two voltages, one small one powers a standby components and bigger voltage powers a line transformer which later produces more small voltages,
then later cancels the first small voltage.

chec your power supply semi conductors like, transistors, diodes and small value resistors, on your power supply. some power supply uses a IC to oscillate a ht. so check a supply at a w/shop.