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Laptop wont display.

post #1 of 7
Thread Starter 
A friend gave me a Hp pavilion dv4 1225dx lap top because the display is not working. Caps lock light is blinking.
what could be wrong?
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post #2 of 7
A lot of things! In e.g.:
  • screen
  • video cable
  • GPU
  • motherboard
  • memory
  • power related issues

It will be good if you have more info about that how laptop is stopped working. If not then you should start with its disabling to find out what is wrong.
post #3 of 7
I think the first thing that you should do is to find out whether it's a screen problem. If you have an extra monitor. Use HDMI cable for that. If there is display on external monitor then you got a problem on the screen and that needs to be replaced.
post #4 of 7
Thread Starter 
Quote:
Originally Posted by valexer View Post

I think the first thing that you should do is to find out whether it's a screen problem. If you have an extra monitor. Use HDMI cable for that. If there is display on external monitor then you got a problem on the screen and that needs to be replaced.

Its a hardware/software problem. I tried that and got no results. Im going to crack it open today and have a look. I hope I can fix it, its decent.
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post #5 of 7
Thread Starter 
Quote:
Originally Posted by duhai View Post

A lot of things! In e.g.:
  • screen
  • video cable
  • GPU
  • motherboard
  • memory
  • power related issues

It will be good if you have more info about that how laptop is stopped working. If not then you should start with its disabling to find out what is wrong.

I know it was having heating issues. The person i got it from said it was the hard drive but that person is known for making stuff up to make them self's seem smart.
If it was the hard drive I would at least be able to see bios.
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post #6 of 7
ive had the same problem with a laptop, had to pull the mobo out and heat the gpu chip with a torch. it fixed it so far its been 4 months. but my cap lock wasn't blinking?

you can cross out bad hdd.
Edited by valtopps - 8/1/13 at 10:13am
post #7 of 7
@sabbathcrazy
Quote:
“If it was the hard drive I would at least be able to see bios.”
You are correct! The hard drive is not the cause.

First check the PSU and its cables, after that check out the video cable and its connector from the motherboard side. Some times from frequently open/close cycles of the lid or laptop dropping the connector can be loose. A simple unplug/plug can fix the issue.

Remove/Insert the memory or replace it. Check the system if it works correctly. Here it is a video:



My guess is probably that the problem is caused by the GPU. The fix in that case is GPU replacement which is not easy task because it requires decent soldering skills and right equipment. Finally entire motherboard check is required too.

The fastest way is to check out on ebay for the same model motherboard and depending on your budget and price to make your choice. For me a price higher than $100 is not worth it.

If you decide to take a replacement mobo take and IC diamond thermal compound for the CPU/GPU, thermal memory pads or copper shims and use 99% Isopropyl Alcohol to clean all parts before the assembling.
Edited by duhai - 8/2/13 at 5:08pm
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