Monitor switching on
Posted on 2003-10-21
Two computers, similar problem:
On each computer when first switching on they sometimes do not always switch the monitor on. On one the monitor stays blank, on the other it is blank for a while then displays garbage.
The first computer has 32Mb on-board graphics (MS6340 m/b), Win98, 224Mb system RAM: it has been stable for a long time; this happened out of the blue and has continued for about 8 months. It may occur on one boot up in twenty.
The second computer has 64Mb Ati Radeon card (new), 256Mb system RAM, Win Me. This has just started to misbehave and may occur also about one in twenty times.
The computers are both 3-4 years old; the monitors have been ruled out, the RAM has been changed.
Apart from the obvious - why?, my question is about the boot up sequence that involves the monitor. I presume it involves a signal from the m/b to the monitor, but why should it lose the signal, and why should the second computer eventually get a garbage signal (all colours, no readable screen).
In both cases the rest of the devices and software load normally: you can close it down in the usual way, you just can't see anything useful.. any ideas on how to narrow the problem down?