Hi Tom,
This kind of problem generally occurs due to loose or dry solderings in the inverter section. If you can do it yourself please check the inverter board carefully and resolder the dry solderings. Or let some TV tech handle this.
I hope This will solve your problem.
Good Luck.
SOURCE: Backlight of LCD turns off
Hi,
For latitude systems they have this ambient light sensor. it basically adjusts the brightness of the screen depening on room lighting. try to go to bios by hitting F2 on the dell logo. go to video and try to look for ambient light sensor. however, im not sure if your computer has that feature I have a second option for you though. based on the troubleshooting you've done, it seems that the video back lighting is affected by movement. it would be a good try to reseat the LCD cable. you can use this link to guide you in fixing the computer : http://support.dell.com/support/edocs/systems/latd505/sm/keyboard.htm
all you need to do is to take out the keyboard with 2 screw holding it in place. the LCD cable should then be accessible. it a thick cable that coming out of the Left hinge.
Hope this helps.
thanks.
SOURCE: My samsung tv turns on and off repeatedly at
Mine was doing that then it quit even turning on so I replaced the 4 Capacitors today on the power supply board that had bulged up on the top 3 had split open they where on the top right corner of the board where the ribbon jumps from the power board to the main board with ones from Jameco Part Number 606521 they worked perfect but make sure you put them in with the correct polarity easy to do just keep an eye on it. Very simple repair and took me about 30 min to take itapart solder on the new ones and put it back together all for under $10.
SOURCE: Blank Screen but sound works on samsung HPS-S5053
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SOURCE: No picture on Philips LCD TV
One very common problem encountered on many Philips models, old and new, In some cases, the SSB board has to be replaced as the resistor on the PCB on the back of the CRT had to be fixed. In other cases the Y Sustain board had to be replaced. If the problem is not due to these two issues, then the capacitors will need to be replaced as they only have a fixed guaranteed life. Thus, it would be wise to take out an extended warranty on Philips due to this common repair issue which often occurs after the limited warranty has ended. Or you could just call your local repairman. There are lots of websites on how to fix it yourself on google. There could be many reasons. Hope this helps!
SOURCE: Tv works if the backlight stay min. but pickture
It is the power supply and if you replace the bad or bulged electrolytic caps on the power supply, or you can buy a new power supply at www.partstore.com.
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