Problem booting up my 5y/o pc

guoleh

Reputable
Dec 29, 2014
7
0
4,510
CPU: Intel Pentium E5400
RAM: 2GB
GPU: Asus GeForce 210
Window 7 32bit

It was a few months ago I stopped using the tower PC because, while before I stopped using the computer it crashes several time. Sometimes it doesn't boot (stuck at window booting/nothing on screen etc.) happens quite frequently.
Until today I tried to boot up the PC, everything boots (the whole POST and a steady one beep). After the POST screen the monitor goes blank (backlit, but nothing is showing up)
What's the problem with this PC? :/