Question about HP Compaq nc6120 Notebook
When I press the power button there is a short burst from the cooling fan - the hard drive active light shows green - the charging light flashes amber 8 times and then it all stops dead. No sign of life from the screen during this process. Any ideas very gratefully received.
Here's a link to troubleshoot the startup of your notebook, from the HP online support site, and another link that explains how to reseat the ram, which is worth a try. Has it exhibited any unusual symptoms, blue screens, etc. recently? It sounds like either some kind of hardware conflict, or a bad power supply.
Unfortunately, the nc6120 has its internal power supply on the system board and can't be changed separately. The part #s and removal/replacement instructions are in the service manual, link here. This is a somewhat widespread issue, and if you're still covered by warranty, I recommend you get it in for service. Otherwise, you or a reliable tech could start selectively unplugging hardware and see if that is indeed the problem. See links to similar posts here.
Best of luck with it. I hate to be the bearer of bad news, but have it checked out before you buy a new board.
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Posted on May 20, 2009
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Posted on Jan 02, 2017
Tips for a great answer:
you plug in the power cord is there any lights whatsoever on the computer?
When you press the power button do you hear fans running, hard drive spinning, lights on the computer, hear any beeps or lights constantly blinking, hear the DvD/CD drive click and the light on the drawer of the DvD/CD turn on for a second or two? If so the laptop is trying to boot or may have booted, but the screen is not showing for some reason.
Beep tones and blinking lights tells the technicians what is going on with the computer and why it is not booting. Most times it's a motherboard issue when you hear beeps or blinking lights continuous. Most times the problem is with the memory or Video Card. Count the Blinking Lights or Beeps and take note of their pattern (1 Long or 1 Long followed by 2 Short).
Maybe your power cord is bad if you don't get anything to happen whatsoever when you press the power button.
you have a Static Charge Buildup. Remove the Power Cord, then Press and
Hold the power button for 30 seconds. After 30 seconds plug the power
cord back in and hit the power button to see if it boots.
your memory is bad or the memory slot is bad.
the Power Cord, Open the Case and remove one of the memory chips. Set the
chip aside then try rebooting the computer. If it boots, then you know
the memory chip you set aside is bad so mark an x on it with an ink pen.
If it fails to boot then move the chip to the next memory slot and try
rebooting. If it fails take the chip out and set it aside, then put the
other chip in and try booting it in both slots. If it boots, just to
verify that the chip set aside is bad, mark an x on it and put it into the open
memory chip slot and try booting.
your power supply is bad. Sometimes there is enough power to make the
power light or some other lights come on but not enough power to make the fan
turn on or hard drive spin.
Below are links and info I found from Dell's Website based on your model.
Controls and Lights Front of computer:
Power button - push button
green light - Blinking green in sleep state; solid green for power-on state.
amber light - Blinking amber indicates a problem with the power supply inside the computer. If the system cannot boot and there is a solid amber light, this indicates a problem with the system board (see "Power Problems" in your Owner's Manual).
four lights on the front panel (see Diagnostic Lights.)
Standby power light
AUX_PWR_LED on the system board
Hard-drive activity light
green light - When the computer is reading data from or writing data to the hard drive.
LAN indicator light
green light - Solid green indicates that a LAN (local area network) connection is established.
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