Screen flickers and turns off, inverter or inverter board?
I know that its likely the inverter or the inverter board, but I was hoping that someone could help me determine which.
My backlight works sometimes - but after a short period it usually goes dark. This can be fixed temporarily by turning the brightness all the way down and then up.
This fix only works sometime, and some jiggling of the screen usually helps if its not working. When it doesn't work, the screen flashes on for a fraction of a second then off immediately after.
I've opened it up, and neither the inverter board or the cable look toasted or worn out really, although I didn't get to see all of the cable.
I'm thinking its the board, as the screen will flicker for a fraction of a second when the brightness is increased from 0 to 1, which to me seems to imply that the cable is ok as if no power was reaching the board it would not flicker at all. Then again, I'm no expert in this.
I've read through most of the other threads, but couldn't find the answer, so sorry if this is a repeat question!
Thanks in advance for all your help, and the sweet guides on this site. Oh and I'm fairly savvy so feel free to ask whatever!
Due to the age of the machine, along with the flickering you mention and with changing the brightness level sometimes bringing life to the backlight 90% chance the CCFL bulb in the LCD has reached it's lifespan. The other 10% inverter cable or inverter. The CCFL bulb can be replaced, but it is not an easy job. Most people chose to replace the entire LCD. New LCDs for these are available on eBay for about $70USD including shipping.
To test the inverter cable. Preform a continuity test using an analog multimeter/mult
One way to test the inverter, if you have a multimeter that can measure frequencies of 50k or more, take a piece of paper and use it as an air gap between the probes and run it along the lower bezel if you get a measurement of around 30k towards the center your inverter is good. Inverters are cheap enough to buy one to swap out to be sure it is not the problem.