Before going any further please note that the PC in question is NOT the one which is in my profile. This is a PC which I 'rescued' after being thrown out by a school as not working. I was going to salvage parts but found that it worked apart from the onboard LAN
I thought that readers might think I am referring to the PC as described in my 'profile'
Since my original post I found that once (yes only once) the monitor worked using the DVI cable.
I am well aware that the PSU
for the PC is lower than it should be. The original PC used onboard VIDEO, LAN
and SOUND and only had a 250watt PSU
and appeared to operate ok. That was before it came into my possession.
Since I acquired it I added a sound card (to obtain the gameport only), a LAN
card (the onboard LAN
didn't work) and a PCIe 16x 512Mb video card. The dox with the video card suggests a minimum 400 watt PSU
I have NOT yet upgraded the PSU
Because the heat sink on both the video card and the 915G Express Chipset get very warm even though the heat sink on the video card has a fan.
I am thinking that this is possibly because the power supply is over stressed - am I thinking correctly?
Would they get warmer than normal if the supply voltage is low?
Also when using the DVI cable the (motherboard) POST messages appear but once Windows starts to load nothing is displayed maybe because by that time the power supply has warmed up and started to become overloaded.
Strange though that everything displays correctly when using the analogue cable.
Hey I just remembered that (with TV sets ) if digital signals are low then you may not get a display whereas if analogue siganls are low then the picture will display but with an inferior image - Arie, am I on the right 'track'.
I intend to see if there is an improvement using a 300 watt PSU
(I have a spare one which is too big for the desktop case but will try it and see what happens and then consider purchasing a new case with 400watt+ PSU
I look forward to your expert opinion(s)
Thanks again everyone for your replies.
I hope that I never stop learning.