Help with HP monitor, screen goes black and power on led remains white

[Antao111]

Hi everyone

 

I have a HP Pavilion 22bw monitor and in the last few days it started to something like "turn off" by itself, this monitor has a white led next to the power button, and when it's turned on the led goes white, if it is on standby mode the led goes orange, however, it started to turn off the screen randomly, but the power on button remains white, I've already try to check the power settings on my computer and try with a desktop (with a GT610) and also with my laptop (lenovo Z400 with Intel Graphics 3000) and the monitor does the same, if I low the brightness the time that takes to turn off is a little longer than if it's at medium or max brighntess, but keeps doing it (kind of like if it was some overheating issue) and I have to remove the power line and reconnect it a few seconds later, and it turns on again, if I press the power button while it's on the "overheated" status, it does nothing so If somebody can help me, I've also removed the mainboard of the monitor and cleaned it with some alcohol, it worked fine like 20~30 mins after that, but again did the same, besides call HP(because I ran out of warranty), do you guys know another solution?

 

thanks