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Equipment Repairs => LCD TV forum => Topic started by: polter on February 20, 2014,20:05:02

Title: Has Faulty Power Supply Blown The lot?
Post by: polter on February 20, 2014,20:05:02

hi - i have a sandstrom s24led11- when i switched on only the red standby/power light was working - everything else is completely dead.

the power supply has a single 12v output - when i meter tested on dc i got 12v ok but on the ac meter range i got 26v. - all the caps look ok.

i bench powered directly but still no luck - can anyone please enlighten me as i'm obviously not a tv tech.

Title: Re: Has Faulty Power Supply Blown The lot?
Post by: Keith on February 21, 2014,07:46:48

Hi
A steady LED would normally indicate that the standby voltage is working, if nothing happens when you press the on button, the SSB circuit will probably have a fault, either eeprom or flash data corruption, microprocessor fault, or possibly LV regulators. The PSU is probably OK, but needs to be tested by forcing on.
Your best and safest option would be to take it to a repair shop!

Keith

Title: Re: Has Faulty Power Supply Blown The lot?
Post by: Davy on February 23, 2014,14:18:33

If the set has any push buttons check the tac switches. They can become leaky preventing 'boot up'.

Had this on a couple of other brands, the standby led wouldn't even come on on one of them, all I did was disconnect the button assembly rebooted and used the remote.  This is fine if the remote sensors isn't on the same panel and share the same connectors.

Sometimes a reset works wonders too in these situations.

Dave

Title: Re: Has Faulty Power Supply Blown The lot?
Post by: Turnip on February 24, 2014,12:31:08

Hi,

Agree with Keith.

In most every case problem is due to Eeprom corruption. Maybe a replacement main board from Fleabay -

But check screen size, also screen maker - Different panels for all - nothing easy - Chris

Title: Re: Has Faulty Power Supply Blown The lot?
Post by: lemonscampi10 on March 05, 2014,12:52:07

Hi please try this it might sound silly but it works well I hope it does on ypur tv it does on mine press down the"VOL -" button on the TV itself and the MENU button on the remote, both for 5 seconds.
And hopefully it will be up and running i have to do this on mine please try thankyou for reading