No image is displayed on the monitor?

Question

Electronics

Good day! Recently, after cleaning and reassembling the PC, I stumbled upon the following problem: "When turned on, the coolers spin, the processor heats up, the fans at the vidyuhi spin and it lights up with a green indicator, the speaker does not beep, the RAM heats up to 45 degrees, but there is no image on the monitor !!!"
By the way, when I cut off the remains of the collective farm from the back of the mat. The board touched the contacts with a knife, they say it is necessary to make contacts with copper !!!
PS: I pulled out the RAM AND the Video card, HDD, but the speaker is silent...

Answer 1

Did you damage the tracks? Take a good quality photo of the problem area.
If the tracks, then look for either a normal service or a new mother.