My Samsung LN32D403 tv I flickering and have changed boards what else could be causing this?

If your QN75Q60TBFXZA screen keeps flicking and cycling, it could be caused by a few different issues, even if you already changed out the CPU board:

1. Check the power cable to ensure that it is securely plugged in and that the outlet is working properly.
2. Check the cable connections on the back of the TV to ensure that they are all securely plugged in.
3. Check the power supply to ensure that it is functioning properly. If the power supply is faulty, it can cause the screen to flicker and cycle.
4. Check the main board to ensure that it is functioning properly. If the main board is faulty, it can cause the screen to flicker and cycle.
5. Check the power supply cable connection to the main board. If the cable is loose, damaged or not properly connected, it could be causing the issue.
6. If the problem persists, consider contacting Samsung customer service or a technician for further assistance.

It's important to note that screen flickering and cycling can be caused by a malfunction or damage in the power supply, the main board or even the backlight. It's also important to check that all the connections are secure and that no damage has been made to the cable or the board during the repair process.

although the digital board could be a suspect, i would lean more to the dmd board. the board will hve to be repaired by a proper tv technician or it will lead to more critical state.

feel free 4 further assistance n keep sending more question n comments or doubts that arise in ur mind regarding this to me.rate the solution as fixya if it helps u understand n solve ur problem

The t con board or LCD panel of the tv is faulty. Can confirm by replacing the t con board.
If you wish to get some details; check the site linked here. Pull up older posts.
http://electro-medical.blogspot.com/

Could be the mother board circuit.

Hmm. What produces the images on the TV?
It's the video card in the computer!

Hi there, unfortunately there can be a problem with power insufficiency... if you have two USB connectors side by side on the back of TV set , please use Y Usb cabel and connect both in TV set and the other end to HDD. Or if your HDD comes with external power supply ac adapter connect it first. Then try again.Tnx

you might want to call Samsung as if picture flickering especially on scene changes etc several models have a issue where a jumper needs to be removed on the power board that causes this==I think your model is one of them--a little design flaw.

Some of their sets have a issue on the power supply board where it flickers(the picture) on scene changes and gradually gets worse.

problem with those sets is on the power board and some only require a jumper there to be removed.

Call samsung with the model number.

The screen flicker than go blank,does it still have power to the tv set?Yes,than this cause only can be causes by only 2 boards in the tv can causes this problems,if tv power still stable for the set.The T-CON board it shorting out and dying for this problems to happen or worst case causes the Main board tv Tuner signal board it dying.The T-CON board the priced it is cheaper and could cause this problems too.Tries change this T-CON board first,see what happen.This board T-CON board sit at the bottom in the middle of the LCD screen panel to decodes pictures pixel before it go onto the LCD screen panel.Tries websites like Shopjimmy.com,Ebay.com to buy a refurbish T-CON board for the replacement.

I had the same issue occur on my ln55c650 and they had to replace the power supply pc-board. Seems some issue with power module in the TV rather than the side panels. Luckily for me, TV was still in warranty.