Don't know if this is the best place to ask, but I will give it a try .....
TV is Samsung UE40EH5300K.
Looked online, and Samsung repairs will not deal with devices more than six years old. (they say because of issues with availability of parts)
This TV is a little more than six years old, but I bought this specifically to watch Blu-ray movies in my bedroom, where no aerial or network signal was available: I estimate the TV has had no more than 200 hours of use from new.
Before anyone chimes in with the usual "Buy a new TV", that I have already done, but I would still like to get this one fully functional again.
The Fault:
TV will not power up from standby. This fault came about gradually, the set becoming increasingly reluctant to power up, although once it does, it works perfectly.
This appears to be a common fault with Samsung TVs, and numerous examples found online suggest that the solution is to blow hot air from a hairdryer through the casing!
And, YES! This does work.
But is not a solution, Have to spend about ten minutes hair drying the telly every time that I want to switch it on!
This TV meets my needs better than current models, so I am keen to get it fixed. As it works perfectly once hair-dryered, I guess that whatever the cause of the problem is, it is likely rather trivial. Professional TV repairers seem to incline to "we only change boards, and it is usually cheaper to replace the TV!"
There are a number of suggestions that a bad electrolytic capacitor, in power supply, is cause of these problems, and that older Samsungs are renown for this.
Looks like my only option is DIY repair. I have many times past, replaced faulty electrolytic caps on circuit boards. However, the last time I opened up a TV to look for bad caps, I could not find any evidence of such.
I have meters and oscilloscope, and am fairly proficient in use of these, but have no background in repairing TVs as such.
The Question:
Can anyone tell me, or refer me to a suitable source of info, on how to systematically find the fault on the power board of this TV?
TV is Samsung UE40EH5300K.
Looked online, and Samsung repairs will not deal with devices more than six years old. (they say because of issues with availability of parts)
This TV is a little more than six years old, but I bought this specifically to watch Blu-ray movies in my bedroom, where no aerial or network signal was available: I estimate the TV has had no more than 200 hours of use from new.
Before anyone chimes in with the usual "Buy a new TV", that I have already done, but I would still like to get this one fully functional again.
The Fault:
TV will not power up from standby. This fault came about gradually, the set becoming increasingly reluctant to power up, although once it does, it works perfectly.
This appears to be a common fault with Samsung TVs, and numerous examples found online suggest that the solution is to blow hot air from a hairdryer through the casing!
And, YES! This does work.
But is not a solution, Have to spend about ten minutes hair drying the telly every time that I want to switch it on!
This TV meets my needs better than current models, so I am keen to get it fixed. As it works perfectly once hair-dryered, I guess that whatever the cause of the problem is, it is likely rather trivial. Professional TV repairers seem to incline to "we only change boards, and it is usually cheaper to replace the TV!"
There are a number of suggestions that a bad electrolytic capacitor, in power supply, is cause of these problems, and that older Samsungs are renown for this.
Looks like my only option is DIY repair. I have many times past, replaced faulty electrolytic caps on circuit boards. However, the last time I opened up a TV to look for bad caps, I could not find any evidence of such.
I have meters and oscilloscope, and am fairly proficient in use of these, but have no background in repairing TVs as such.
The Question:
Can anyone tell me, or refer me to a suitable source of info, on how to systematically find the fault on the power board of this TV?
Last edited:
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