Long "warming up" monitor on system cold start [Solved]?

Question

NVIDIA

There is a system: ASUS P5WD2-Premium motherboard, Intel D 3.0 GHz, 4Gb RAM, NVidia GeForce 7590 GT, Belinea 10 20 35W monitor.
The problem is this: during a cold start (that is, the first time in a day), the screen is just black for a long time (5-15 minutes), while the system boots normally and after this time a password prompt appears. In this case, the signal is sent to the monitor during this entire time, because. the power button is on and there is no "No signal" inscription. If during these 5-15 minutes the system is overloaded with a reset, then the monitor most often (but not always) is normally picked up and everything is visible, starting with the BIOS boot.
Of the additional problems noticed, the monitor power button works every other time (bad contact, requires 5-6 clicks to turn it on).
In which direction to dig - a monitor or a video card (or something else)? How to check? The budget is very limited, so buying something new and understanding that “not that” is not an option. Drag to the service for a couple of days for diagnostics is an option, but only after I have tried all possible methods of solving at home.
An extract from the "anamnesis": the computer is about 3 years old, there was no problem during the initial assembly, it manifested itself over time, and at first the BIOS boot and the entrance to Windows were visible, the screen turned off after logging in also for 10 minutes. We sinned on the dampness of Win7 R.C. Then the monitor power button died, the monitor “rested” for half a year, instead of it there was an old Sony CRT, but due to its age it heats up for a very long time, so it’s difficult to determine if there are problems with displaying the BIOS “cold”. The power button worked by itself, Belinea was returned to service, Win 7 Retail was installed, and then there are such problems ...
PS Please do not offer the “do not turn off at night” option.
UPD . The culprit was the monitor, thanks for the help. By the way, I wonder why the No signal picture is shown at any degree of warming up?

Answer 1

Most likely, the problem is in the monitor (more specifically, in dried capacitors). But just in case, you need to check by connecting the monitor to another computer. If it’s really a monitor, take it in for repair, otherwise it will only get worse.

Answer 2

Connect the monitor for a cold start to another PC (for example, borrow a laptop from friends / neighbors for 2 minutes). And then it will be clear: if the problem remains - problems with the monitor; there is no problem - something with your PC.

Answer 3

Well, it's clear that the problem is with the monitor. The OS has nothing to do with it, otherwise you would see the boot sequence on the screen when you press power. If there were problems with the video card, during a “cold” start, you would probably hear a suspicious beeper signal.
Try instead of “resetting” a couple of times to poke the power out of the monitor and insert it back, it might start working.
If you can, please post the result. Interesting. :)

Answer 4

I had exactly the same problem. Monitor is at fault

Answer 5

Probably towards the video card, looking at the latest update. If it is treated with a reset and there is no “no signal” inscription. And if the reset is not treated, but only by simply waiting, you can still dig towards the cable. Maybe he shifts a little and contact appears. Or it warms up and the metal expands and connects. In the monitor, I think, nothing.