1. My Samsung QN55Q75FMFXZA TV has problem start with remote control, it was intermittently stop working 2. The warranty company replaced the main aboard, but the remote problem is still there.

SOURCE: how hard it is to replace by yourself main board Samsung LN-T4065

You need to do some more diagnosing of the problem. If you get sound and change channels take a bright flashlight and place it again the screen. Look for an image around the edge of the flashlight.
If you see an image that means the LCD controller board (TCON) is probably good.

The problem is probably one of three causes;
1) Inverter board is bad
2) CCFT (cold cathode fluorescent light) are bad.
3) Power to the inverter board is bad. You can also check the connectors.

andy williard

• 226 Answers
• Posted on Apr 28, 2009

SOURCE: Remote control has stopped working.

your remote needs to be put back in TV mode. press the tv button or slide the switch to tv

Dana Newcombe

• 1564 Answers
• Posted on Jul 24, 2009

SOURCE: remote control not working on brand new series 4 42 inch samsung

Make sure the remote is set to operate your tv and not a cable box or accesory. It's in the menu

SOURCE: Bose 3-2-1 Remote Control stopped working

I purchased a LAZBOY universal remote (at Fred Meyers, on sale for $9.99) and after a bunch of research and trial-&-error, was able
program it with a code (1629) which works reasonably well with the
Bose 3-2-1.

I don't have all the system-level functions (which I never utilized anyway) but do have all the basics as far as power, volume, source, and CD/DVD control.

SOURCE: TV remote RM-ED002 for main TV works fine except volume

I had the same problem with sony remot control RM-ED002, take remot control apart and clean inside with damp cloth and dry with kitchen towel, thats it now use it! ;-)
When i opened mine it was some kind of moisture under volume and channel buttons, cleaning and drying it helped.