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New to repairing Laptops

Discussion in 'Hardware' started by jlabit, Apr 8, 2011.

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  1. jlabit

    jlabit Thread Starter

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    My daughter-in-law just called and told me her laptop fails to power up. I haven't looked at it yet. She is bringing it over tomorrow. I have built and repaired my own and other family members desktop computers for quite some time and feel comfortable working with them. However, I have never in my life even owned a laptop computer. The one she owns is a Compaq Presario F756NR. They don't have a lot of money and I told her I would do some research on the internet and see if I can figure out how to troubleshoot this unit. I am not looking for specific info right now, as I haven't looked at the unit yet. Anyone have a website I might go look at to get a good idea where to start with disassembling this thing and troubleshooting? I wish it were a desktop. Thanks.
     
  2. raybro

    raybro

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    A good place to start would be getting a manual. Click here to download the manual.

    Raybro
     
  3. srhoades

    srhoades

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    Take the battery out and see if it will power with just the AC adapter. Then make sure the AC adapter has power. Often people twist up the cord when they transport it and over time it breaks the connection in the cable. Next make sure the AC plug is snug in the laptop and doesn't wiggle around. If the connection has been broken there you can either replace the AC jack or you have to re-solder it (depending on the laptop).

    You should be able to find videos on youtube for any specific repairs that you need to do.
     
  4. jlabit

    jlabit Thread Starter

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    Thanks guys. Appreciate the feedback. I am going to troubleshoot it like I would a desktop. Unfortunately, I have no spare parts to sub in. That area you mentioned with the power input sounds like a good place to start. I'll keep posting once I get my hands on it. Thanks again.
     
  5. jlabit

    jlabit Thread Starter

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    Just received the laptop at my house. When the AC adapter is plugged in, you get a blue light where it is plugged in, so appears the adapter is providing power. With AC power on, when turning on the power switch, the on light and the rest of the lights stay illuminated for approximately one second and then it shuts off. This happens with both the battery in place, and with it removed. If this were a desktop, I would suspect a dirty CPU cooler causing overheating. What are your thoughts on a good place to start with this machine? Again, thanks for reading.
     
  6. srhoades

    srhoades

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    Unplug it, take out the battery, hard drive, and RAM (they are usually very accesable, a panel for each). Put them back in and try booting with just the AC power, no battery.
     
  7. parttimetechie

    parttimetechie Banned

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    Take out the battery, unplug it from AC power, and hold the power button for sixty seconds. Then plug AC power back in and see if it boots
     
  8. jlabit

    jlabit Thread Starter

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    Thanks for your response guys. She brought it over tonight and I did a quick lookover, which I reported above. When she left, she packed it up and took it home with her. Guess she's afraid I'll break it worse. lol She is supposed to bring it back tomorrow at 2:00 PM and promises to leave it this time. I will do those things tomorrow PM and report back to you. Thanks again.
     
  9. jlabit

    jlabit Thread Starter

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    I performed both of the tasks you listed above and still have the same problem. The blue light on the power switch, a blue light on the touchpad, and several blue lights on the front will come on for about one second, and then everything shuts off. I listened for fan noise, but did not hear anything. I worked around jet aircraft for 30 years in the U.S. Air Force and don't hear very well, but I could not hear a fan running.
     
  10. parttimetechie

    parttimetechie Banned

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    Have you tried using a can of compressed air and blowing out the fan ducts?
     
  11. jlabit

    jlabit Thread Starter

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    No I haven't. If this were a desktop, I would disassemble it and just clean the cooler. Don't know how to do that on this one. I believe I see the inlet and outlet for the CPU cooling. I'm going to Walmart to pick up a can of air and will try that this afternoon. Thanks.
     
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