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My laptop is of (compaq Hp). When i switch on main power button of my laptop,the lights on front side blinks for 2/3 secs,then automatically it get switched off.Nothing happen on screen.But it is charging properly.

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  • Shaun Harris
    Shaun Harris May 11, 2010

    The computer gets switched off?

    On some machines when you turn on the main power, the lights do blink for a second or two and the screen seems like it's not coming on and then it starts. When you turn it on give a few minutes to come on. Some computers act like that, it takes a few minutes to boot up.

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1 Answer

It get switched of automatically aftr that 2/3 secs.

Posted on Jul 01, 2008

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How to re-wire a Compaq Presario SR2150NX Case power Switch


The plastic front of your desktop computer is the Front Panel.

The area of contact pins on the motherboard, that the wires from the Front Panel go to, is the Front Panel header.

F_PANEL_1

The Front Panel header contains connections for the Power On switch, Power On LED light, HarDDrive activity LED light, and so on.

http://h10025.www1.hp.com/ewfrf/wc/document?docname=c00864922&tmp_task=prodinfoCategory&cc=us&dlc=en&lang=en&lc=en&product=3339274

(Look at the motherboard photo. The Front Panel header is at the bottom right. Scroll down for the motherboard illustration )

There are 9 contact pins.
4 across the Top row, and 5 across the Bottom row.

The four pins across the Top row are numbered EVEN.

From the Left side going towards the Right side;
Pins 2, 4, 6, and 8. There is NO pin 10, just a blank spot.

The five pins across the Bottom row are numbered ODD.
Pins 1, 3, 5, 7, and 9.

A) Pins 2 and 4 are for the Power On switch

B) Pins 6 and 8 are for the Power On LED

(LED is dim when the computer is on? Switch the wires around )

C) Pins 1 and 3 are for the HarDDrive activity LED

(LED is dim when the harddrive is operating? Switch the wires around)

D) Pins 5 and 7 are for a Reset switch, IF a Reset switch is used.

How to know which wires are for the Power On switch, Power On LED, and HDD LED?

Follow the wires into the Front Panel. Remove the Front Panel, and follow them.
(Need guidance removing the Front Panel post in a Comment )

For additional questions please post in a Comment.

Regards,
joecoolvette

May 02, 2012 | HP Compaq Presario SR2150NX PC Desktop

4 Answers

Hp compaq dc 7100 , my problem is that as i start my pc than 4 beep with time interval 0.2 sec with led than after 0.5 sec it start again , remain continously


Are they Long Beeps? Does the RED led light on the front show up?
If there is no RED led light blinking, then the problem is your RAM.
If there IS a RED led Light showing up, then the problem is your Power Supply.

Mar 27, 2011 | HP Compaq dc7100 PC Desktop

1 Answer

I have an HP Compaq dc7600 sff that will not power on. It has a solid green light on motherboard, no other response.


1) perform a powerdrain i.e. unplug the power cable from the back of the computer and then press power button and hold it down for 10 secs
2) open up the chasis and reseat the power cable i.e ATX connector coming out of the SMPS to the motherboard

Feb 15, 2010 | HP Compaq dc7600 Small Form Factor PC...

1 Answer

Front panel on-off switch blinks instead of steady blue.


Hi,
There are chances that the system is standby mode. Disconnect the power cable from the back of the system and then press and hold the power button for 10 sec. Reconnect the power cord and press the power button to check


Thanks for using Fixya
proton

Nov 07, 2009 | HP Computers & Internet

2 Answers

HP Compaq Presario SR1820NX will not turn on


i worked for hp and compaq it is well known issue to reslove this issue

1#turn off the computer and uplug the power cable from the computer and then hold the power button for 20 second then turn on the computer and the momment you back to desktop screen
go to download driver from hp site and here is the web site http://h10025.www1.hp.com/ewfrf/wc/softwareDownloadIndex?softwareitem=pv-43507-1&lc=en&dlc=en&cc=ca&lang=en&os=228&product=1841849 and restart the computer .

Apr 15, 2009 | HP Compaq Presario SR1820NX (ER919AA) PC...

1 Answer

Hp pavillion desktop will not power up. Blinking green light at power supply


Step 1 : Turn off the system by pressing the power button for 5 - 10 sec until the power LED is off. Removed all cables including the power cable (Exclude monitor cable and KeyBoard/Mouse).

Step 2 : Press power button for 5-10 sec again to drain fela power.

Step 3 : Reconnect the power cable at the back of the tower/computer and power on the system.

**If the same problem exists, Call HP tech Support (800-474-6836) because there is a high possibility that you have a bad Motherboard or Power Supply on the system.

Oct 28, 2008 | HP Computers & Internet

1 Answer

Laptop compaq presario f500,running vista.Wireless is not working,Windows cannot load the drivers required for this device. (Code 31)


Matt Sydney Aug 4, 2008 00:28:44 GMT 10 pts
I experienced this problem last night, and seemed to have fixed it this morning.

SYMPTOMS: HP Pavilion dv9000, Win Vista x64 Ultimate. Running on battery, battery level became critical; windows went into 'Hibernate' mode. Upon plugging in to mains power, and resuming the Windows session, the Wireless is still disabled, no matter what position the switch is in.


POSSIBLE CAUSE: Critical battery switches off the wireless network card to preserve power. Motherboard seems to log this status but when re-connecting to mains power the card does not receive power again. Uninstalling the driver and getting Windows to re-install automatically upon re-boot does not work.


SOLUTION: Charge up the battery whilst the computer is running. You can charge it to a substantial level, say, above 25%. Disconnect mains power so that your laptop is running on battery only. Set your wireless switch to OFF (this is usually to the left position, away from the orange indicator). Now run your computer down to the critical battery level again (perhaps overnight). In the morning when you press the power button, the 'CHARGE' indicator (looks like a lightning bolt) on the front of the laptop should flash quickly, indicating that there is no charge in the battery. Remove the battery from the laptop's underside. Wait a couple of seconds, then press and hold the power button for 30 seconds. Keeping the battery off the laptop, reconnect mains power. Boot up your PC. When at the Windows desktop and all your startup programs have finished loading, switch your wireless on (to the right position). You should now have a blue light, and wireless should once again be working. You can now re-insert your battery. You might have to setup your wireless network connection again as mine seemed to be 'lost', but at least hopefully the main problem is now fixed.




Jamie Madriz Aug 8, 2008 01:58:15 GMT N/A: Question Author
Matt, i did what u said, and i'm happy because my wireless switch is WORKING! :) Hopefully it stays this way.

Sep 23, 2008 | Computers & Internet

2 Answers

Booting up


one light is for hardrive activity , the other is to show the power is on.. the flashing one is most likely the power light as most computers will tell you when thier ill....the beeping is an error code and should be in some pattern EG: Power LED blinks red twice, once a second, followed by a two second pause. Or something like that. Take note of the pattern and repost it here, then we can give you a specific area to look at.

Sep 16, 2008 | HP Compaq d530c PC Desktop

4 Answers

HP Compaq d530


it all depends on the number of flashes , pause, repeat.
Since the problem did not indicate any beeps her is the following info


Power LED blinks RED 2 times, one every second, followed by a
2-second pause. = Processor Thermal Protection Activated


3 blinks 1 second apart = Processor not installed (not an indicator for a bad processor).

4 blinks 1 second apart .= Power Failure (power supply is overloaded)

Other possibilities are:
5 blinks 1 second apart No memory
6 blinks 1 second apart No graphics
7 blinks 1 second apart System board failure (detected prior to video)
8 blinks 1 second apart Invalid ROM

Nov 07, 2007 | HP Compaq Business d530 Ultra-Slim PC...

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