screen dies computer unresponsive

[Jambonhead]

im not that up to speed with doing that tbh i dont know that much about pcs, if it doesnt work still when i go back to uni in 3 weeks ill take it to a repair shop near me

 

[damocles]

EDIT: I think, leave the cmos for now and maybe come to that later

OK...First thing, didn't think you would take a hoover to it - Also was the power disconnected when you did the clean up.

Do your fans work when you power up?

Check the monitor cable at the back and make sure it's secure.

No power to the monitors - with the computers power off, cable disconnected and you earthed ( touch a radiator or an earthed object to lose your static ) have a look inside to see if your videocard is seated properly and that all cables are connected to the videocard and motherboard - you may have sucked one out.

 

[damocles]

If possible, can you take a good pic of the inside - we can see straight away if something is a miss and guide you.

 

[hkancyr]

Never, ever use the blowing end of the vacuum cleaner (Hoover) to blow out your case!! A technician where I worked told me that tip. Use canned compressed air for that.
If you are still having problems after cleaning and satisfy yourself that the cooling is OK, then it is time to move on to the PSU. Since you mention that you know of a shop, bring it to them and tell them that you suspect the PSU as being the culprit. If you need a new PSU get one that is rated higher than the one you currently have, that way if you end up upgrading something you wont have to worry about enough power for the new hardware.
If you do it sooner than later you will have time to insure that they fixed it correctly before your off to school.
Good luck with the computer and your studies.