Question about HP Compaq Presario CQ50-110US Laptop

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LED light for AC power comes on but no fan, no power, blank screen

The power cord works. Removed hard drive, RAM, and battery. Press power button and held for a minute. No fan start or screen display.

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1 Answer

NOEL

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  • HP Master
  • 8,546 Answers

Have you tryed just the mains with out the battery ,some laptops wont start if the battery is faulty,
or if the fan is full of dust and dirt and it can not turn, your laptop will not start.

Posted on Mar 30, 2015

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5 Related Answers

Anonymous

  • 2 Answers

SOURCE: hp dv2000 won't turn on...

dude, I almost gave up.. try this link. Apparently lots of people experienced this problem so HP gave an extended warranty for models like these.

Here, more info: http://h10025.www1.hp.com/ewfrf/wc/document?docname=c01087277&lc=en&cc=us

To contact HP in North America call 1-866-671-7362 from 6:00 am to 11:00 pm MST, 7 days a week.

Posted on Nov 29, 2008

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Anonymous

  • 152 Answers

SOURCE: nx6310 wont stay on

HP is notorious for this problem. The problem is that the power jack that is connected to the motherboard has come loose. This is an easy fix is you are comfortable taking apart your notebook and are able to solder the jack back to the motherboard. I have 2 HPs and my friend has 2 and we have done this with ours as well as others. This is the link to the HP website that has your manual for disassembly .http://h20000.www2.hp.com/bizsupport/TechSupport/DocumentIndex.jsp?contentType=SupportManual&lang=en&cc=us&docIndexId=64179&taskId=101&prodTypeId=321957&prodSeriesId=1839143 When you get to the page, download the Maintenance and Service Guide. (It is all the way at the bottom!) You will need Adobe Acroabt to read it. PRINT the instructions. They will do you no good if they are on the laptop that you are trying to disassemble!

While it may seem daunting, it is really not hard to do. Just be careful to follow all of the disassembly and reassembly instructions and you will have no problems. I promise!


Please remember to rate my solution! Thanks

Posted on Feb 05, 2009

mraviteja

Raviteja Mopidevi

  • 51 Answers

SOURCE: dv2120us keyboard buttons light but screen black, won't boot

Hello Atty

I understand that your Notebook is not powering on. Your Notebooks , that is dv2120us is having a manufacturing defect. So HP accepted that the Notebook will be serviced under the plan "One Time Service Enhancement" . Even if the Notebook is out of warranty your Notebook may be serviced. For more information log on to the chat support .

.http://welcome.hp.com/country/us/en/contact/chat_1.html

They will assist you with the details and the procedure, how to send your Notebook to HP for service.

Posted on Feb 16, 2009

Anonymous

  • 1 Answer

SOURCE: HP Pavillion Entertainment PC screen blank, power lights on

try this put off the laptop and remove the battery and the power cable and then hold the power button from 30-60 seconds then put back the power cable(without battery) and switch it on it should work then shutdown and put battery pack in

Posted on May 10, 2009

Anonymous

  • 175 Answers

SOURCE: My compaq laptop doesn't turn on

Hello,

At the bottom of the laptop, find and open the placing of RAM. Unplug each RAM from its bank, clean each RAM and also its bank, Plug them again in different bank. Lock your placing, now check.



Just remember to take your time and don't get nervous working on the computer. Please report back to the thread the results of your work.


Regards;
Hassan

Posted on Jul 08, 2009

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1 Answer

Satellite - LED light on with AC power cord but blank screen and doesn't turn on


video card is the number 1 issue for Toshiba satellite models, need to reheat the mounting of the video card.

avoid disassembling the unit, what I did was.
*blow dryer (for the hair)
1.use the blow dryer to heat up the side of your Toshiba, point at the exhaust, located on the left side, do this for 35 seconds.
2.after using the blower, turn on the power button again and see what happens =D

hopefully it will work.
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I had the same problem and it solved the issue.

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If your laptop appears to boot up and the hard disk LEDflashes, then the problem is probably a back light fault. This can be a faultyinverter or a faulty CCFL lamp. Please click on this link and follow myinstructions to identify the fault and possible fix :- http://www.fixya.com/support/r3598095-faulty_laptop_lcd_screen

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My 1501 Dell Inspiron turns on but I have a blank black screen. The only light that shows is the power light on the upper right side of the laptop.


Power getting to the laptop. Try first to see if this will give a screen image on an external monitor, listen for the sound of the cpu fan, hard drive and DVD rom drives clicking, see if the DVD rom drive will open if pressed.

Then remove battery and AC adaptor, press the power button for 30 secs, refit mains only and try this on mains supply (no battery)

If this fails to boot, check the light on the ac adaptor is a steady green, flashing green indicates power is not fully reaching the laptop (motherboard problems)

If it is steady and the LED power light on the laptop is steady, suspect the DC jack socket. If this feels loose or sloppy, it will need replacing, depending on the type fitted, it may be soldered onto the board, or a wired connector, which sometimes goes bad.

After that, I'd suggest that a capacitor has gone on the actual motherboard and you will need to strip the laptop to check it.

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My Sager NP9860S was working fine and all of a sudden shut off. There are no lights on at all on it. The external power supply led is dim and blinking. When I unplug it from the laptop, the led is on...


where you having any issues before this happened?have you tested the memory,checked ram seated correctly,hard drive, cables all properly fitted?

remove the battery from the pc and the power cord.
then press the start button for one minute to discharge all electricity from the motherboard.
then put the ac cord back in and wait 10 seconds.then press the start button.you may have a faulty battery so try the ac cord procedure first.

i also understand this is a gaming machine.check your video card!

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I have a dell Inspirion 9400 and it won't start. When I press the power button, all that happens is the power light and the dvd player light comes on and about 3 seconds it turns off. Does it with and...


It shows no power on your laptop but it shows you the dvd player led comes on then off. I would suggest try the following:
1. Remove laptop battery, optical drive, hard drive and ram. Remove external peripherals as well. 2. Make sure AC Adapter is not yet connected to the laptop. Press and hold on the laptop's power button for 10 seconds to drain the power flea. 3. Connect the AC Adapter to a known good power outlet, check AC Adapter power LED if it is on. Try to sense if AC Adapter is not making a bit of noise when it is plugin to the wall power outlet. 4. Connect now the AC Adapter to the laptop. Check if AC Adapter LED stays on when it is connected to the laptop. If the LED stays on means the AC Adapter is fine. If the AC Adapter LED turned off check the AC Adapter pin that goes to the laptop AC socket if it is loose. 5. If AC Adapter stays on after connecting to the laptop try to power on laptop. If no power LED comes on then this is motherboard problem. 6. Before replacing the motherboard there is one checking needs to do. If you can open your laptop bottom part then good, do this when laptop is not connected to any power source. Try to reseat the laptop CMOS battery then try to power on laptop after, if still fails then replace motherboard. I hope this helps.

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1 Answer

Cannot turn on my LG Notebook anymore


Will the laptop boot with the power adapter connected and battery removed? If so, boot it up and install the battery once it's booted up. If okay now, the battery was just really really drained. If okay with no battery but no good with battery, the battery may be bad, or something in the charging circuit may be defective - keep the battery out or replace mainboard ($$$$ - get a new laptop)
If no good with ac adapter and no battery, test the adapter with an electrical meter. It should be putting out 18-19 volts. If not, try a replacement adapter. If adapter tests good but laptop won't boot with no battery, likely the mainboard.
Also - remove hard drive and try to power up. If good, replace hard drive. If no good, reinstall hard drive and remove ram and try to power up. If it powers up, clean the ram and slot contacts gently with a pink pencil eraser and try testing each ram chip in each slot, 1 chip at a time. If still no good, start shopping for a new laptop.

Let me know if this helps or not...

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HP DV2036ea i have a blank screen on the computer


Hello there

Description.

When pressing the notebook power button nothing is displayed on the screen or display. The cause of this problem may be a failed AC adapter, the memory modules (RAM) need to be reseated or a failed notebook system board component which will require an HP certified repair.

Below steps will assist in identifying the cause of the problem and suggest the best solution. Test the AC adapter Follow the steps below to determine whether the problem is related to the AC adapter or your notebook system board.
  1. Remove the battery and disconnect all external devices from the computer.
  2. Hold the Power button for several seconds, with all power sources removed. This drains residual power from the system, and may correct many problems.
  3. Connect the AC adapter to a wall outlet and plug the other end into the computer.
  4. Press the Power button to start the notebook PC.
If the notebook does not start or the display is blank then check the power indicator light or power socket LED. Check the power indicator light or power socket LED On newer models of notebook PCs, there is an LED or indicator light around the power socket on the notebook. Check to see if this light is on or off, when the notebook is plugged into AC power.The power indicator light or power socket light should turn on when the AC adapter is connected.

  • If the light does not turn on then the problem is most likely related to the AC adapter or the electrical source in your home or office. Go to the Light does not turn on section on this page.
  • If the light does turn on but the notebook does not start or the there is a blank screen then continue to the Light does turn on but the notebook does not start section on this page

The light does not turn on when the AC adapter is connected If the power indicator LED is off, the AC power adapter may need to be replaced. To determine if the AC power adapter needs to be replaced follow the steps below:
  1. Ensure that the AC adapter is plugged directly into a known working wall outlet.
    NOTE: To check the wall outlet, plug in a different known working device like a light, radio etc.
  2. Check all of the following connections:
    • The connection from the power cord to the wall outlet.
    • The connection into the power adapter from the power cord.
    • The connection from the AC adapter to the notebook power socket.
  3. Press the power button again to test the notebook PC.
If the power indicator light still does not turn on, then the AC Adapter needs to be replaced. Contact HP Service and Support for further assistance. Power socket LED or power indicator light is on but the notebook does not start If notebook power indicator light (LED) is on, the AC adapter is working correctly. The problem is a result of a hardware failure in the notebook itself. In some cases, reseating the memory module (RAM) may solve the problem.

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Remove the battery the memory the ac adapter,the hard drive, the cd rom.Press and hold the power button down for twenty seconds.try again if no go you will have to replace the systemboard.
Good luck

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2 Answers

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Hi, sorry to hear you are having problems. When this happens it usually suggests that the CPU/system board has failed. If the laptop is still under warranty I would suggest taking it back because this is something that will be covered and they should be able to fix it or replace the laptop itself. If not you may have to pay to have the system board/CPU replaced. Good luck and hope this helps. Si :)

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