Question

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no signal detected

By rosscoandsandi ·
hi there, i have P4 2.8 GHz, XP home SP2 with 4x512MB 400DDR RAM. FX5200 128MB VC. BENQ FP731.
i opened the case the other day and a heap of dust went everywhere. the next time i went to start i got the Following! no signal detected. Fans all start spinning. light on front is on. on off and reset buttons do nothing. have to turn off machine from back of unit. DVD drive opens and spins up.
What can i do. I removed the CMOS battery for 10 minutes. i removed and reseated the RAM sticks, replaced the vid card with a new one. i have read a lot of forums but i cant find the problem. can anyone help.

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Unplug everything

by robo_dev In reply to no signal detected

no ram, no drives, novideo

Just leave in the processor and fan connections and power on the mobo.

A normal mobo should beep like crazy, complaining about no video card or ram. No beeps means the mobo or processor has failed (mobo is more likely).

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fried mobo or cpu

by rosscoandsandi In reply to Unplug everything

thanks for the heads up on the beeping. no RAM, No vid card and NO beeps. as you say sounds like the mobo. it used to make beeps but the cable that says "speaker" isnt connected to the mobo and never has been. there must be another internal speaker i am not seeing.
thanks for your help.
saved me taking it to a shop to tell me the mobo is shot.
ross

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What is happening here is that the monitor isn't getting a signal.

by OH Smeg In reply to no signal detected

Well have you connected the Monitor to the right Socket?

Some computers have a On Board Video and a Plug in Card and if you connect to the On Board Video it may be deactivated in BIOS.

What you need to do is plug into the correct socket and if you forced the plug you will have damaged the pins on the inside of the Plug. So first thing is to pull off the Monitor Lead and look inside it and see if the pins are bent. There should be 3 rows of pins in a D Socket. If any are bent replace the Video Lead and try again.

When you removed the cover what did you do next? If you placed your hand inside the case you may have given the delicate internals a Static Charge destroying the M'Board or some other part.

You could also try another Monitor as it's not beyond reason to believe that the Monitor has failed. I got caught with that one once on a repair when my Monitor failed. I waster hours trying to find the problem with the computer that didn't exist.

Col

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monitor working

by rosscoandsandi In reply to What is happening here is ...

thanks. the monitor works when connected to my laptop with a new lead. desktop has no beeps at all when i fire it up from the power switch at the back cos the front power up button and reset button dont work. i think its the mobo or cpu. time to upgrade the brains of the machine. i have seen quad core cpu for $300 and i guess a new mobo is going to set me back the same.
thanks for your help.
rossco

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Just one thing here

by OH Smeg In reply to monitor working

If you upgrade to a Quad Core CPU you'll need new Ram as well as the New M'Boards use a Different RAM Type.

But the important thing here is if you go to a Quad Core you need to look at a different OS. If you have XP Home that only supports 1 CPU XP Pro supports 2 or a Dual Core CPU but not a Quad Core CPU. Well that's not quite right but it will not make 100% use of the remaining 2 cores of the Quad Core CPU's.

You need to move to Vista Home Premium or better in the Windows Range to use all of a Quad Core CPU of any current version of Linux. BSD.

While you can use XP Pro it will actually be slower than on a Dual Core CPU.

The Quad Cores are expensive in comparison to the Dual Cores as well.

In the AMD Range a Dual Core costs From $120.00 to $330.00 AU and the Quads start at
$330.00 to $414.00 AU

The Intel's are the following price Dual Cores start at $199.00 to $575.00 and the Quads start at $575.00 to $1674.00 AU. That is RRP so you may find some places cheaper but none should be dearer.
Col

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thanks

by rosscoandsandi In reply to Just one thing here

a little research goes a long way. it appears the quad cores are a bit OTT for the time being. the core duos seem to perform as well if not better than the quads. do the dual core cpu's need an OS upgrade. ideally i would change the Mobo, CPU and keep the RAM and XP Home or Pro if possible. thanks again.

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XP Pro will work with Dual Cores

by OH Smeg In reply to thanks

But not XP Home.

So if you are currently using a copy of Pro that will work quite nicely.

Col

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upgrade!

by rosscoandsandi In reply to XP Pro will work with Dua ...

Hi Col, looks like i will have to upgrade to xp pro if i want dual cores to work. how does one upgrade the OS with a cpu and mobo that are fried. i guess you can fire it up with currently installed xp home with the new processor on the new mobo and then what? it looks like its getting very complicated.
cheers
Ross

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Well what I would do is

by OH Smeg In reply to upgrade!

Folow M$ Instructions on Changing a M'Board here

Replace a failed motherboard
This scenario assumes that your existing motherboard has failed and that you cannot start the existing Windows installation on the hard disk.

To replace a failed motherboard with a new motherboard and to then reconfigure Windows to work with the new motherboard, do the following:1. Turn off the computer.
2. Replace the existing motherboard with the new motherboard.
3. Insert your Windows CD in the CD-ROM drive or the DVD-ROM drive, and start the computer from the CD.
4. Do one of the following For Windows Server 2003:a. When you are prompted To set up Windows now, press ENTER, press ENTER.

Setup looks for any previous installations of Windows Server 2003 on the hard disk and then displays a list of any previous installations that it finds.
b. Use the arrow keys to select the installation that you want to repair, and then press R to select the To repair the selected Windows installation, press R option.

This will start the repair of your previous Windows Server 2003 installation.

? For Windows XP:a. When you are prompted To set up Windows now, press ENTER, press ENTER.

Setup looks for any previous installations of Windows XP on the hard disk and then displays a list of any previous installations that it finds.
b. Use the arrow keys to select the installation that you want to repair, and then press R to select the To repair the selected Windows installation, press R option.

This will start the repair of your previous Windows XP installation.

? For Windows 2000:a. When you are prompted To set up Windows 2000 now, press ENTER, press ENTER.

Setup looks for any previous installations of Windows 2000 on the hard disk and then displays a list of any previous installations that it finds.
b. Use the arrow keys to select the installation that you want to repair, and then press R to select the To repair the selected Windows 2000 installation, press R option.

This will start the repair of your previous Windows 2000 installation.


5. Follow the instructions on the screen, and allow Setup to complete the repair of the previous Windows Server 2003 installation, Windows XP installation, or Windows 2000 installation.

Setup installs the HAL, the IDE controller drivers, and any other drivers that the new motherboard must have.
6. After the repair is completed, reinstall any service packs or hotfixes that you had previously installed.


an extract from here

http://tinyurl.com/j9u7

Or my personal first option would be to setup the repaired computer and then proceed to do an In Place install, but this can only be done with a M$ Install Disc so System Recovery Discs are out as they are not a full copy of Windows.

http://tinyurl.com/g4bv8

Col

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