Re: HP Z27s, cycling backlight off for half second, on for 5

There is two red wires to the lamps tied to same point, so I used those as reference point. The readings on each line are:
Green 65.8v
Yellow 66.1v
Brown 65.7v
Black 72.1v

I removed each of those 4 pins to take current reading and they are
Green 120.2mA
Yellow 120.5mA
Brown 121.2mA
Black 122.3mA

Re: HP Z27s, cycling backlight off for half second, on for 5

just to point out the fluke IR pic is in Celsius

and to answer the questions, the solder does look bad in those pics, but are great in person

The monitor does work with the brightness lowered. The timing between the cut off shortens as the brightness increases.

also when the monitor was cutting out (turning backlights on/off) I hit the back part of the board with cold and the monitor worked properly for a minute or two again until it heated back up again.

I have an older HP Z27s Display here that turns on ok from cold and works for a couple minutes, it then shuts off the backlight for about half, then back on for about 5 seconds, then repeats in a never ending cycle.
Thermal imaging points to an IC on power supply, however I cannot find any information online from the markings. (see last photo)
Note, during the time the backlight shuts off, the rectifier output jumps from its constant 105vdc to approx 160vdc (maybe normal because of the loss of load?)

Any further troubleshooting suggestions or IC information?...

Re: New Members - please post your introductions here

Hey my name is Cory, I am from Nova Scotia, Canada. Long time viewer of the site, first time poster.
I love when my google searches lead me here, it has helped many times in the past, hopefully many more. haha