What is the resistance from O1 to O2? What is the resistance from O2 to O4?ħ. What is the part number of the inverter drivers?Ħ. What is the part number of the inverter controller?ĥ. Note the two transformers, outputs O1, O2, O3, and O4, the two drivers, and the inverter controller.Ĥ. Shorting out the fuse is a REALLY bad idea.

Even a poor picture is worth a thousand words. I'll buy a new one but I'd prefer to find the problem.ġ.

This may be stupid but I hardwired the fuse to eliminate that as the cause. The two components (boxes) leading to the LCD were outputing 11v all evenly. On the outside of the transformer it looks perfectly normal. Later down the board it steps from 120 to 136v The inner ( I think secondaries) are not reading any volts. I'm still working on getting better pics but I found interesting readings from what I believe to be the transformer. Take good quality pictures of both top and bottom of the power supply / inverter and attach them to you next post. If you want help, follow the link about attaching pictures in my signature.

There are other possible causes, including a bad transformer, bad ccfl, bad solder joints where the wires are soldered on the end of the ccfls, bad diodes, bad glue, and a few more. Radio Shack does not carry any capacitors that are likely to help, and may be worse than those presently in the monitor. Bad capacitors are one of them, replacing the bad caps with good ones will fix that. There are many causes for the 'two seconds to black' problem. If you saw on Fixya that rubbing horse droppings on the monitor would fix the problems, would you try that? In the world of capacitors, Radio Shack capacitors are the equivalent of horse droppings. I decided the biggest cap 1000uf 25v is for the backlights which seem obvious to need the most power.

Is this safe? What would happen if I used a 1000uf 50v. I'm going to swap the 1000uf 25v with a radio shack 1000uf 35v. I tested the voltage across several cap points on the board and it jumps from high 14v to low 14v. It has to do with the backlights power regulation. When the lights shut down I can still see info on the screen. Many people have had this problem and a solution has never been posted. Hi, I have a 1 year old 19in LCD screen that works perfectly fine for 2-10 seconds and the backlights shut down.

Optiquest monitor q19wb