hdd not recognised.cdrom not working.comp wont start

babssybabe · 11-21-2006, 02:36 PM

hi.. never posted a question before but need advice..
.just put my nephews computer into a new tower unit everything in it is out the old computer except a new power supply..when it starts up it doesnt recognise any drives cdrom wont even open like it has no power.ive never done anything like this before and silly me thought it would be easy ish LOL any help please !!!

chauffeur2 · 11-21-2006, 08:00 PM

Hi babssybabe. Welcome to TSF!

The first thing that comes to mind here is perhaps you might have a 'short' between the tower casing and the motherboard.

So, to diagnose this issue, you will need to take the motherboard out of the tower case, and set it up on a piece of cardboard, with only the bare minimum of components attached.
The bare minimum would be:
CPU + Heatsink/Fan
RAM
1x HDD
1xCD-ROM, and of course the power connections from the Power Supply Unit.

Now power it up and see if you get the CPU Fan spinning...if this occurs; turn it off.
Reinstall the motherboard and make sure that all the mounting screws are insulated with either plastic or fibre washers.
Continue assembling the system, ensuring that all the IDE Ribbons and Molex Power plugs are firmly plugged in. Once this is done, connecting; the monitor to the onboard graphics; keyboard; mouse etc., try powering it up again.

Report back here with the results thus far.

Undermine · 11-22-2006, 12:00 PM

Try it with the old power supply if it works fine your problem is with the new power supply. Make sure it's delivering enough voltage to safely power your computer. If your computer demands 400 watts, and you are only supplying 350, it will not work.

babssybabe · 11-23-2006, 01:10 PM

well thanks for advice .seems that it is all working ok now put old power supply in it ..but i will definatly be back if i run into any more problems..LOL thanks

11-21-2006, 02:36 PM	#1 (permalink)
babssybabe Registered User Join Date: Nov 2006 Location: sleaford Posts: 2 OS: xp	hdd not recognised.cdrom not working.comp wont start hi.. never posted a question before but need advice.. .just put my nephews computer into a new tower unit everything in it is out the old computer except a new power supply..when it starts up it doesnt recognise any drives cdrom wont even open like it has no power.ive never done anything like this before and silly me thought it would be easy ish LOL any help please !!!

11-21-2006, 08:00 PM	#2 (permalink)
chauffeur2 Manager Emeritus Join Date: Feb 2006 Location: Adelaide, South Australia Posts: 10,180 OS: Xp Sp3 with all updates + Vista™ Ultimate SP1. My System	Hi babssybabe. Welcome to TSF! The first thing that comes to mind here is perhaps you might have a 'short' between the tower casing and the motherboard. So, to diagnose this issue, you will need to take the motherboard out of the tower case, and set it up on a piece of cardboard, with only the bare minimum of components attached. The bare minimum would be: CPU + Heatsink/Fan RAM 1x HDD 1xCD-ROM, and of course the power connections from the Power Supply Unit. Now power it up and see if you get the CPU Fan spinning...if this occurs; turn it off. Reinstall the motherboard and make sure that all the mounting screws are insulated with either plastic or fibre washers. Continue assembling the system, ensuring that all the IDE Ribbons and Molex Power plugs are firmly plugged in. Once this is done, connecting; the monitor to the onboard graphics; keyboard; mouse etc., try powering it up again. Report back here with the results thus far. __________________ Dave T. Submit New Articles If it works, Don't fix it! Especially if Bill Gates had anything to do with it!!

11-22-2006, 12:00 PM	#3 (permalink)
Undermine Registered User Join Date: Nov 2006 Posts: 7 OS: XP	Try it with the old power supply if it works fine your problem is with the new power supply. Make sure it's delivering enough voltage to safely power your computer. If your computer demands 400 watts, and you are only supplying 350, it will not work.

11-23-2006, 01:10 PM	#4 (permalink)
babssybabe Registered User Join Date: Nov 2006 Location: sleaford Posts: 2 OS: xp	well thanks for advice .seems that it is all working ok now put old power supply in it ..but i will definatly be back if i run into any more problems..LOL thanks