If your LCD or LED flat panel TV set will not power up or will not stay on ,
If you have an immediate shut down after turning on your TV or sometimes a delayed shutdown,
or the set does not turn on at all and has no picture and no sound .
First eliminate any surge protector /powerstrip problems by plugging set in directly to the mains .
make sure the mains have power .
Next first try a power re set (unplug ther set for a minute or two then plug it back in and turn it on )
If that did not fix it or the problem re occours try a factory reset (see owners manual )
if that did not fix it or the problem re occurs try a firmware update/re install. (see owners manual)
Instructions for the above and firmware downloads are usually available at the
TV manufacturer product support site and listed by your sets model number
Also re setting procedures should be in your owners manual .
If you do not have an owners manual they are usually available at the manufacture product support website on line as well.
If the above did not fix it ,
And you still have an immediate self test fail/shutdown after turning on your TV or sometimes a delayed shutdown it may be caused by a hard fault , a faulty power supply very common and usually not difficult to repair
If your Plasma or LCD/LED or CCFL/LCD TV or monitor has stopped working, or is displaying one of the following symptoms, then it *may* need some new capacitors in the power supply board or a replacement board
If you would like to consider a DIY repair then by all means keep reading.
- Flickering screen
- Screen image disappears after several seconds
- Dim screen
- Slow start
- Power LED on, but no picture
- shuts down for no apparent reason
-No led on no picture or sound
-no picture or sound
-sound and no picture
- Unusual colors and/or lines
The most common failures are electrolytic capacitors on the power supply board.
The primary cause of modern TV and monitor failure is caused by faulty capacitors. in the power supply You can examine the capacitors in your TV or monitor and *sometimes actually see if they are bad.'
capacitors can also look fine and fail also .
New capacitors can sometimes solve a host of problems in monitors and TV's and may often extend the life of your monitor or TV by several years.
as well as get it working properly.
Most of these repairs equally apply to CCFL/LCD and LED/LCD sets also .
Some faults causing your set not to work correctly (or at all) *may be caused by (other than power supply board failures and *other than capacitors ), and may be caused from and not limited to other circuit boards,modules , connecting cables ,other components wires and switches or faulty display panels.
further there *may be more than one failed part or assy.
Power supply capacitor failure * may be less common on newer sets
However if you are having the symptoms listed here capacitor failure* may be present
or another component or components on the board may have failed.
Circuit boards or modules other than power supply boards are *usually* replaced due to embedded non serviceable parts further sometimes power supply boards for many of the same reasons can not be repaired and need to be replaced also.
If after you read this thread ,linked threads and maybe watch some linked videos and do not fell comfortable in safely attempting repairs either further self study or the services of a qualified technician would be best.
Many of AVS members are already familiar with the information here.
This is intended to help newbies if you will, or some one who may other wise be able to complete a successful DIY repair with the information provided here
or the folks that are posting or surfing here simply looking for our help .
After helping a few new members with repairs I thought I would post this so we can just point to the thread . I noticed a lot of new posters here looking for some help
Posted in LCD display device area
I have no interests or affiliations to any of the of the re sellers or retailers or their affiliates or
any links or videos mentioned in this or any thread here at AVS they are provided for information purposes only
To read the complete full contents of the original thread I posted
in Display Devices> LCD Flat Panel Section
and find the information ,instructions and linked DIY videos
Please refer to this thread.
For purposes of discussion the repairs linked here
and in the other linked thread pertain to and are mostly limited to power supply boards
common to Plasma /LED/LCD and CCFL/LCD TV sets Monitors and display devices .