HP dv71-4100 Turns on but no display

[BasicPhreak]

I am working on a customers laptop for a fake virus warning. She brought the laptop to me, turned on, in the computer bag. I could feel it was really hot.
I open the computer and plugged it in with no display.
I had to crash it by holding down the power button until is shut off.
Tried turning it on, it takes a while to load but it does, I can hear the windows sign on sound and I can turn on/off wifi, caps lock. and num lock. All the lights say it is working, but again, no display.
I tried hard reset, taking battery out and unplugging the computer, hold down the power key for 30 seconds. Plug it in but leave battery out. No luck. Tried the hard reset this time putting the battery in again. No luck. I have tried to hook it up to a separate monitor no display there.
I even let it sit for an hour with batter out and un-plugged. No luck.
My guess is when she transported the computer to me powered on and in the laptop bag it over heated and fried the video.

 

[webworkings]

Could be. But when you tried to use an external display, did you make sure to turn off the laptop first, then connect the external display and then turn it on? Sometimes they just won't work otherwise.

You could also try the following...

Make sure you wait until the computer would be fully loaded before trying this, and not try it right away like you would to say get into BIOS. This needs you to actually be where you would be when Windows Explorer loads.

1. Press "Shift" repeatedly until the "sticky keys" window show ups.

2. Now click the the link there that will lead to the "Ease of Access Center".

3. Next click "Cancel" on the the bottom right corner of the "Set Up Sticky Keys" window.

4. From here you want to click "Control Panel" on the upper left corner (it should be right beside the "Make Your Computer Easier to Use" title.

5. Locate the "Computer Settings" menu and then choose the "Recovery" icon (make sure that your view of this is by either large or small icons for easier access).

6. Now click and open "System Restore".

7. Here you want to click next on the bottom right corner (a few times) until the button "Finish" shows up and then click it. (Just follow everything prompt that the window says which will lead you to recovering your previous system, in a certain time.

8. The computer will now do the work it needs to and then reboot.


If that doesn't work, you can try the following...

You can also try doing the Ctrl+Alt+Delete and see if you can get "Task Manager" to show.


If the "Task Manager" windows shows, then choose "New Task" and then type in EXPLORER. If the desktop shows up then you need to go into "Start", "Programs", then "Accessories" and finally "Command Prompt". (Or you can do a search for CMD.)

Make sure you load the "Command Prompt" with Administrator access. Then when it loads type in....

SFC /SCANNOW

It will do a file check.

To learn more about "SFC" visit this link at Microsoft... https/support.microsoft.com/en-us/kb/929833

 

[BasicPhreak]

I can not do the steps you listed because the display is BLANK, nothing.
I did try the external monitor by hooking it up before turning on the computer with no luck

 

[webworkings]

Actually, the steps I listed above do not require you see the screen. They are for if you can't see anything and can't get it to connect to an external monitor. To see if it is the Sticky Keys that are the cause of the problem. However, if the computer turns on (and you can hear it stay on) and the above steps do not do anything, then I would be leaning towards the graphics card/GPU needing replacing.