Question about Compaq PC Desktops

1 Answer

Pc will not power on .Press main power button on the front of the server,all fans work and front Disk LED glows yellow. Power LED at rear glows green but LED on the front(light bulb symbol) not lit. Checked screen and cabling ,all fine ( work on another Machine) Open case and measured power at P2,P3,P4 reading just over 12 v dc

Posted by on

1 Answer

  • Level 2:

    An expert who has achieved level 2 by getting 100 points

    MVP:

    An expert that gotĀ 5 achievements.

    Governor:

    An expert whose answer gotĀ voted for 20 times.

    Scholar:

    An expert who has written 20 answers of more than 400 characters.

  • Expert
  • 141 Answers

Open the case and check the connection between the case power button and the motherboard. unplug that connection and short out the pins on the mb. The computer should start up. If it doesn't, there is something wrong with the mobo. If it does, there is something wrong with the switch, or the connector wasn't tight.

Posted on Sep 06, 2008

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

HP IQ 526 When I press the power button the backlights flash and the power led goes yellow after a few seconds the screen flashes again and the fans restart then it just stays dark, if I hold the power...


Hi Jerry,
Do follow the steps below...
1. Remove the RAM from the motherboard and switch it on. (you'll get 6 continuos beeps) Refix the RAM and check whether it is working or not...
2. Remove the CMOS battery and switch on the PC_ Switch off_Re fix the battery to the slot_Switch on...
3. Disconnect the hard disk from the PC and switch it on...

May 21, 2012 | HP TOUCHSMART IQ526 PC PC Desktop

1 Answer

3 beep sound


If a PC suddenly fails to boot properly, you should perform a hard reset as the first action. Performing the hard reset will correct many problems. If the computer still does not start properly, select your symptom from the list below to guide you to the recommended corrective actions.
  1. Disconnect all peripheral devices and remove all USB devices and SD media cards. You want to test the computer not the accessories!
  2. Disconnect the AC power adapter, remove the battery, and then press and hold the power button for at least 15 seconds to drain all residual power and restore default startup settings.
  3. Reconnect the AC power adapter (but do not insert the battery), Press the Power button, Look for glowing LEDs near caps lock and num lock keys, and Listen for sounds of a fan or other moving parts turning.
  4. If the computer does not start, the LED lights do not glow, and the display is black, you can perform one or more of the following actions to resolve the no power issue.
    • Verify the computer is receiving power from the AC adapter . Verify that the AC adapter is not damaged and is connected correctly to a working wall outlet plug. Verify AC power is connected to the system board by examining the AC adapter, wiring, and pin connection for damage. The keyboard LEDs will glow when AC power is connected to the system board. Damaged components, like the AC adapter or the pin in the power connector, may require an HP-certified repair.
    • Use a different AC power adapter . If you have access to a different AC adapter or power pack that is designed for the computer, connect it to the notebook and try to start the computer. If you own or have access to more than one notebook, verify that you are using the adapter which belongs to the notebook. CAUTION: Using a power adapter that does not meet the power requirements or has the wrong type of connector may damage the computer. On newer notebook models, connecting the wrong adapter to the notebook may cause the power LED lights to blink but not power the computer.
    • Remove the battery and boot on AC power only . A discharged or defective battery may prevent the AC adapter from supplying enough power to start the computer. To verify that power from the AC adapter is available for PC; remove the battery, connect AC power adapter, and press power button. If available, try using a different AC adapter, that is rated for the PC, and repeat this test.
    • Remove the AC adapter and boot on battery power only . A defective AC adapter may not charge the battery and prevent the computer from booting on battery power only. To verify battery power available for the PC; connect AC power adapter, allow battery to charge for 30 minutes or more, disconnect the power adapter and press power button. If available, try using a fully charged battery, of the same type, from another computer and repeat this test.
      • If LEDS do not glow and the fan or hard drive do not spin, battery may need to be replaced.
      • If tests of both the battery and the AC adapter fail, there may be a problem with system board requiring service by HP.
      • If LEDs glow and PC boots, the AC adapter may need to be replaced.
      • If LEDs glow, but PC does not boot go to LEDs glow, fan is heard, but display is black or blank section.

Nov 21, 2010 | HP Compaq d530c PC Desktop

1 Answer

The yellow power led light blinks on front of the emachine w2646. The CPU Fan works. The power button will not turn the PC on or off, you just have to plug in the power cord to turn it on. The monitor just...


Did you flash the main board ??

1.) remove battery
2.) press and hold the power button for 10 - 30 seconds
3.) replace battery.
4.) when the system boots it will say press XX (e.g F2) to load defaults and continue ,, press that key.

It could also be the power button is stuck!.

find were it connects to the main boad and unplug it
bridge the 2 pins it jacks into to turn the computer on. if it works u will need to replace that button or the case.



Feb 26, 2010 | E-Machines eMachines Desktop PC

1 Answer

Brand new Dell Vostro 220S won't power up


Depending where you are check that the voltage is correct , it should show 110 for US and 220 for EU and other countries

Ensure that the processor power cable is securely connected to the system
board power connector (see your Service Manual at support.dell.com).
•Ensure that the main power cable and the front panel cable are securely
connected to the system board connector (see your Service Manual at
support.dell.com).

Jan 07, 2010 | Dell Vostro 220S PC Desktop

1 Answer

My asus mother board not working


STEP: Ensure Correct Power Button Is Used and Is Not Sticking or Broken. If the power button remains depressed during the power-on attempt, the computer immediately powers off, mimicking a "no power" symptom. Ensure the button is not being held down too long or binding against the bezel or chassis. If necessary, remove the front cover to press the button directly.
2. or else...STEP: Check the Power Button LED on the Front of the Computer (on Blinking yellow)
Initial state of LED at power up.
Indicates system has power, but the POWER_GOOD signal is not yet active.
If the hard drive LED is off, it is probable that the power supply needs to be replaced.
If the hard drive LED is on, it is probable that an onboard regulator or VRM has failed. Look at the diagnostic LEDs for further information. or lese..

3. STEP: Restart the Computer Using the Power Button.Press and hold the power button down until the computer powers off. This should not require more than 10 - 15 seconds.Press the power button to turn on the computer.
4. STEP: Verify the Power Supply Voltage Selector Is Correct for the Region. Verify the setting for the power supply:
*Unplug the power cable from the back of the system. *Press and hold the power button for at least 5 seconds to discharge remaining power.*Inspect the voltage selector setting on the back of the machine (Figure 1). Ensure that the voltage select is set in the correct position for the region the in which the system is operating: For Europe and Asia, the voltage setting should be 230V.In North America, Mexico, parts of Central and South America, and parts of the Caribbean, the voltage setting should be 115V.*Plug the power cord back into the back of the system.*Turn on the power.
STEP: Try a Different Known-Good Wall Outlet.
STEP: Remove All External Devices. Turn the system off.
Unplug everything from the front and back of the system except for the power cord or AC adapter, including: keyboard mouse monitor speakers printers scanners USB devices handheld PDAs external Zip or CD-R drives joysticks/game pads, etc
Attempt to turn the system on.
STEP: Check the Power Button LED on the Front of the Computer

Blinking Amber/yellow: Initial state of LED at power up.
Indicates system has power, but the POWER_GOOD signal is not yet active.
If the hard drive LED is off, it is probable that the power supply needs to be replaced.
If the hard drive LED is on, it is probable that an onboard regulator or VRM has failed.

If all the lead is off, then have the mother board replaced

May 06, 2009 | Dell Dimension 2400 PC Desktop

2 Answers

Computer won't start up


sounds like the cpu is dead, if your fan was full of dust theres a high chance it wasnt working properly for a while which would of caused the cpu to fry from lack of proper cooling and also the dust in the vents would have prevented heat from escapeing so its highly probable that the cpu is dead try replaceing it, i cannot gaurentee that anything else internally got fried from the heat tho, i had a similar problem a week ago

May 03, 2009 | PC Desktops

2 Answers

I replaced the video card and it still will not boot up.


IF A&B are yellow and C&D are green it indicates a memory error.

If A&B are yellow and C&D are off then it indicates that the computer is in sleep or reduced power mode.

What was your symptoms before you replaced the video card? Sometimes if the power supply is weak or bad or you have a bad motherboard then you get no video output. Check your cpacitors on your mobo for leaking or swelling. Let us know what you find out.

Apr 30, 2009 | PC Desktops

1 Answer

Starting problem after hibernation


Do you hear a beep (POST Beep) within 2 sec when you power on the computer?

Apr 27, 2009 | PC Desktops

1 Answer

Last Night I use my PC for 4 hours but after that i turn off properly but when in the morning i try to on my PC it didn't turn on when i press the power button nothing displaying for me only one light is...


First of all when you switchon your PC, checkout whether your processor Fan is running. Because problem might be because of SMTP failure [Power Supply in your CPU] if its working fine and you are able to see LED glowing in *********** board, might be loose connection in your Hard disk cable.
Let me know this didn't help you out or if you need more info.

Mar 13, 2009 | IBM NetVista PC Desktop

1 Answer

Thinkcentre M55 8806 power on off problem


May be your computer motherboard wires connection get loose or getting moisture in wires. Or there may be some earthing problem in ur power switch. First, check the wires connection & tighten up properly. if problem persists, check the earthing by power tester. Check you RAM if it is properly tight in the jack.

Dec 26, 2008 | PC Desktops

Not finding what you are looking for?
PC Desktops Logo

Related Topics:

129 people viewed this question

Ask a Question

Usually answered in minutes!

Top Compaq PC Desktops Experts

joecoolvette
joecoolvette

Level 3 Expert

5660 Answers

Michael Thomas
Michael Thomas

Level 3 Expert

3051 Answers

Brian Sullivan
Brian Sullivan

Level 3 Expert

27725 Answers

Are you a Compaq PC Desktop Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...