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Computer will not turn on

I have a compaq nx9500 laptop, it will not turn on with the battery in it. When I plug the power supply into it and turn it on, the power and other auxillary lights light up, and shut right back off. Could this be a processor problem or a motherbord problem?

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Sounds like m/board to me. had a similar problem myself with a toshiba. cheaper to buy a new one than it was to repair it.

Posted on Apr 13, 2008

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Posted on Jan 02, 2017

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If i record in my compaq nx9500 after the recording if i play it it will give me some sound under the recording


If you're using the built in the mic that's feedback because laptop mics are low powered they have the gain boosted in Windows. Try using an external mic and check the setting on the volume settings for recording devices. (Right click the volume icon)

If it's a buzzing/squealing noise you're concerned about that might be "ground loop" usually caused by having the laptop plugged into the mains or less commonly having loads of cpu intensive applications running in the background.

Also if the laptop is on a hard surface make sure that it isn't vibrating because the mic sensitivity will pick it up and because of the gain boost it will be amplified.
Gain = Volume

Hope that helps

Feb 26, 2015 | HP Compaq nx9500 Notebook

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I have a Compaq Presario R3000 with Windows XP OS. Until recently it had been working fine. Suddenly, the power went off while still connected to the AC Supply and the Laptop just went off. The battery...


1. Remove battery from the laptop. 2. Unplug the power cord from the computer. 3. Let the computer sit for a few min. 4. Leave battery out. 5. Connect power adapter to computer 6. Push power button to turn computer on. 7. If computer powers on shut down again, and put battery back in. 8. Push power button to turn computer back on (at this point battery and power adapter should be connected to the computer)
If computer powers on with power adapter with the battery out. You are having a battery issue. You would want to look into replacing the battery. If computer does not power on with just the power adapter. You are most likely having a power issue. Depending on how old the laptop is. You will either want to contact the manufacturer. Or take the computer to a computer repair shop, or consider replacing the laptop.

May 31, 2011 | Compaq Presario R3000 Notebook

1 Answer

I have nx9500. No power on response UNLESS 1.) battery is removed and 2.) on/off switch held down for 30+seconds and 3.) AC brick then plugged in. When all this is done and on/off switch pressed, the LEDs...


It would appear from what you say, there is a short on the motherboard. This can cause the adapter to shut down, which it is suppose to do. Unless there is an object in the laptop, the motherboard is damaged and must be repair/replaced.
Please rate this solution.

Apr 07, 2011 | HP Compaq nx9500 Notebook

1 Answer

I have a HP/Compaq 6510b laptop computer and it will not turn on...I have the charger plugged in and the only thing happening is the green light periodically flashes...Is the battery bad?


IF the battery is bad the charge lndicator on the laptop will flash (But not periodically) it will be a constant on-off-on-off..... Best check would be to remove the battery completely and use the adapter/charger power supply only. If it still does not turn on then you either have a bad power jack connection or a more serious motherboard problem. Also is the green light flashing on the adapter/charger or is it the charge/battery indicator on the laptop?

Feb 17, 2011 | HP Original HP COMPAQ 6510b 6515b 6710b AC...

1 Answer

My compaq presario laptop keeps getting an error: 0211 keyboard error it says press F1 to resume or F10 to setup but neither one of them does anything when I push them. Can this be fixed?


Hi,

1. Turn off computer and unplug power cord.
2. Disconnect all external devices(open up the computer tower and then )
3. remove battery
4. press power button and hold for 10-15 seconds
5. plug power cord back into computer and press power button.
6. Check LED’s and listen for power supply fan.
7. If LED’s are on or power supply fan starts spinning, watch for boot screen
8. If coputer begins to turn on, turn it off.
9. Reconnect battery and external devices.
10. Press power button and make sure computer starts.

This should work....all the best

May 19, 2010 | Computers & Internet

2 Answers

Horizontal lines at boot on laptop screen and external screen hp compaq nx9500


your video chip on the mainboard most likely needs the cold solder joints repaired by re-flowing the solder. A pro must do this ,very tricky.

Oct 10, 2009 | HP Compaq nx9500 Notebook

1 Answer

HP Laptop Compaq NX9500. Problems with motherboard. Found there is classaction suit but this serial number is just outside those that are covered. HP no longer makes replacement parts and refuses to...


Check with any local computer repair shops, they may have another compaq nx9500 laying around that they could swap the motherboards with. Some may even offer to do a free diagnostic.

I also found this ebay auction which offers motherboard repair (don't worry, it's not mine):
http://cgi.ebay.com/HP-nx9500-nx9500A-nx9600-MOTHERBOARD-REPAIR_W0QQitemZ140286672043QQcmdZViewItemQQptZLH_DefaultDomain_0?hash=item140286672043&_trksid=p3286.c0.m14&_trkparms=72%3A1205%7C66%3A2%7C65%3A12%7C39%3A1%7C240%3A1318%7C301%3A1%7C293%3A1%7C294%3A50

If all else fails, you can sell the parts off piecemeal (memory, hard drive, cd/dvd drive, etc.) on ebay and try to get more than $200.

Dec 08, 2008 | Computers & Internet

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