Dell E196FPf - No image or power indication

[JimsMonitors]

Good Day!

I have a Dell E196FPf LCD Monitor that when I turn on gives no image and no power indication on the LED. So I opened it up to check out the power board (suspecting to find a few bad caps). Everything looked just fine (no swollen caps, no dark areas, etc.). The power supply board number is: 79044120-R (490441200113R on back side of board).

Based on what I read on another post, I tested the voltage across the large capacitor. It read 165.8V steady. I also tested the voltage levels on Pins 3 and 7 of U850 (power controller). Pin 3 was 18.18V steady and Pin 7 was 15.52V steady.

Based on this information, can anyone offer me any suggestions as to what I should try next?

Thank you.

Jim

[TechGeek]

Re: Dell E196FPf - No image or power indication

Try bypassing the power switch entirely. That's one thing to try. Also, do you have an ESR meter?

[budm]

Re: Dell E196FPf - No image or power indication

Try bypassing the power switch entirely. That's one thing to try. Also, do you have an ESR meter?

What do you mean by bypassing the power switch?

@JimsMonitors: How about some clear pictures of the unit and boards?

[TechGeek]

Re: Dell E196FPf - No image or power indication

What do you mean by bypassing the power switch?

@JimsMonitors: How about some clear pictures of the unit and boards?

Fully removing it from the circuit and when plugged in to mains, touching both wires together to simulate the pressing of the power button.