Question about Dell Vostro 200 PC Desktop

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The monitor does not have signal (either one, I tried two to make sure it wasn't the monitor) but the harddrive will turn on with the fan running very loud. Del Vostro 200 desktop.

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Computer build


No Signal means the Monitor is not receiving a connection or communicating with the Video Card. If you placed a Video Card in one of the slots make sure it is pushed in all the way. Your video card is not in correctly or it is faulty.

If you can boot to the Bios or System Setup make sure you have things enabled such as the pci slots, usb ports, the hard drive on Auto so it can configure itself, etc. There might also be a video setting that you need to tweak.

May 10, 2012 | Computers & Internet

2 Answers

THE FANS WORK BUT NOTHING SHOWS ON THE MONITOR AND ITS QUIETER THAN USUAL


1.Cooling fans work?
2.No Signal shown on monitor?
3.Harddrive doesn't make any noise? (To explain. Harddrive is inactive. Not spinning, and the arms aren't moving back, and forth across the platters)

Suggest it's a bad power supply. A common occurrence.

Why?
1.Owner fails to keep the inside of the computer clean, and the power supply.

Dust/Dirt/Spider Webs/Lint, you name it, builds up inside. This foreign material clogs up cooling components. Specifically the Processor fan, and Heatsink, plus the power supply fan, and heatsink's inside the power supply.

Result?
Processor heats up. Takes more power to run, until eventually it turns off. (Processor's have a thermal limit. Once this thermal limit is exceeded, BIOS turns the processor off)

Power supply heats up. Fan blades and center hub collects Dust/Dirt, as well as heatsink's inside the power supply. Cooling capacity drops tremendously.

Heat = Wasted Energy. The power supply puts out more, and more power to keep up. Eventually components inside the power supply fail. They burn up. (More on this to follow)

2.Cheap power supply. Cheap construction, and cheap materials used. Pre-built computer manufacturers generally use cheaply made power supply's. Saves them money.

A.Gauge of wiring used inside is too small.
B.Electrolytic Capacitors used are of an inferior design, and of cheap quality.
C.Circuit design is below par.
D.Other components used are of low quality.

So how does a bad power supply still light-lights, and spin fans?

Bad power rail.
Personal computer power supply's put out three main voltages.
A.12 Volts
B.5 Volts
C.3.3 Volts

Electrolytic Capacitors used in a power supply are Filters. They filter the incoming AC electricity, and the rectified DC. When one or more capacitors fail, or are failing, a bad power rail results.

1.ALL the lights uses less than 1 Watt.
2.EACH fan uses 2 to 3 Watts.

A typical Processor uses 55 to 125 Watts. Depends on which processor it is.

So you see, you can have enough power to light those lights, spin fans, and even spin the harddrive motor, but not enough to turn the processor on. (Or if it does turn on, not enough to keep it running)

You can easily prove it's the power supply at fault, if you have a known, good, power supply to use for a test.
Another 300 Watt unit that has the same power cables. (Should be stated as has at LEAST the same power cables. It can have more power cables, and these just won't be used)

No processor running you get no signal to the monitor. Computer isn't working to give a signal to the monitor.

Computer is quieter than normal, because you don't hear any harddrive noise. No processor running to access the Operating System on the harddrive. (Or programs and applications)

(Windows XP is an example of an Operating System. O/S)

Just for information, this link gives details of the components inside a harddrive. Gives you more info about the Arms, and Platters I referred to above.
Just thought I would include it. It is not advertising for this website, but is included for reference.

http://computer.howstuffworks.com/hard-disk.htm


Nov 13, 2009 | Gateway (ATX-300-12EB3) (ATX30012EB3)...

1 Answer

Screen does not turn on but green light is on.


Green light indicates the monitor is getting power. Nothing coming up on the screen indicates, No Signal.

No signal from the computer. This means the computer itself isn't working.

A bad power supply in the computer can cause this. A bad power supply is the leading cause of desktop computer failure. It is replaceable, and can be done by the owner relatively easy.

You may have a computer tower that the Power light comes on, you hear fan/s spinning, (Including the Power Supply fan), and it sounds like the harddrive is running.

ALL the lights in your computer use less than 1 Watt.
EACH fan uses 2 to 3 Watts.
A harddrive sitting there spinning in an endless loop, consumes about 2 to 3 Watts.

A Processor uses 51 to 125 Watts. Depends on what Processor it is.

A weak Power Supply will have enough power for lights, fans, and that harddrive sitting there spinning.
It won't have enough power to turn on the Processor.

[No processor operating, then the harddrive sits there spinning in an endless loop, because there is no processor to find the boot sector]

For a test, connect your monitor to a know good computer. See if it works.
Now connect that other monitor to your computer.

Sep 05, 2009 | Sampo P7011M (Silver) 17 in. Flat Panel...

1 Answer

Emachine light, fan and harddrive come on only.


Hi,

Please check the cable between monitor and computer and make sure everything is properly connected. try unpluging and reconnect it.

Thanks,
CF

Jun 25, 2009 | E-Machines eMachines Desktop PC

1 Answer

Mother board no display


Looks like the lights are on? Fans spin? Sounds like the harddrives spinning? The power supply is bad. has just enough power to light lights, and spin fans, but not enough for the processor. (No beep sounds, because BIOS hasn't done a memory count. It's not going to)

ALL the lights use less than 1 Watt.
EACH fan uses 2 to 3 Watts.
The harddrive just sitting there spinning, uses about 5 watts.

Processors use 55 Watts to 125 Watts. Depends on the processor.
Not enough power to turn the processor on, the computer won't work. Computer isn't working there isn't anything to turn the monitor on. No Signal.

Apr 17, 2009 | Intel Motherboard

1 Answer

HP Pavilion a1150y fans run when powered on but windows doesn't load, monitor, mouse and keyboard do not work. (Running Windows XP)


Believe it or not, it's due to a weak power supply. More specifically, weak voltage rail/s caused by failing Electrolytic Capacitors.

A bad computer power supply is about 70% of computer failure.

ALL the light use less than 1 Watt. EACH fan uses 2 to 3 Watts.

A processor uses 55 to 125 Watts. Depends on the make and model.

Since the power supply is weak, it doesn't have enough power to turn the processor on.
No processor, nothing to find the Boot record on the harddrive. Nothing to get the Operating System going. (Example: Windows XP)

No computer running, there is no signal to the monitor.
Just enough power to light lights, and spin fans.

Apr 13, 2009 | HP Computers & Internet

1 Answer

Gateway FPD1760TFT LCD monitor


Problem
1. turn on computer
2. monitor receives signal, it looks like its working
3. it goes through some steps and then the monitor says "no signal" and kind of stays in limbo with fans running, etc.

Solution
One possibility is that computer is looking for drivers for you video card. It could be hung up looking in the wrong places. Remove all peripheral hard drives and memory sticks. Try again.

Jan 12, 2009 | Gateway FPD1760 17" LCD Monitor

1 Answer

Dimension e521 black screen no video signal


if your num lock key responds, you may have to reseat/change the video card (if you are sure monitor is good). else you need to replace your motherboard.
Getback if you need any clarifications

Jan 09, 2009 | Dell Dimension E521 PC Desktop

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