Go Back   Tech Support Forum > Hardware Support > Laptop Support

Compaq Presario C700 Display Problems

This is a discussion on Compaq Presario C700 Display Problems within the Laptop Support forums, part of the Tech Support Forum category. I have had the weirdest problem with my Compaq Presario C700 laptop. One night I shut down my laptop and


Reply
 
Thread Tools Search this Thread
Old 11-19-2010, 09:45 PM   #1
Registered Member
 
Join Date: Feb 2008
Posts: 244
OS: Windows XP



I have had the weirdest problem with my Compaq Presario C700 laptop. One night I shut down my laptop and the next morning when i went to start it up I see a white screen with colored lines going down the screen. I connected an external display via VGA port on the laptop and it displayed fine. But as soon as I disconnected the external display it stops working. The weird thing is sometimes it boots up and the screen works fine. Other times I get that white screen. I have wiped the hard drive and reinstalled the OS so it is not a driver issue. What is going on?

__________________
GrandslammerBD is offline   Reply With Quote
Old 11-19-2010, 10:02 PM   #2
GZ
Team Manager
- Hardware
- Microsoft Support
 
GZ's Avatar
 
Join Date: Jan 2010
Location: New Jersey
Posts: 25,089
OS: Windows 8 Professional x64

My System

Send a message via AIM to GZ Send a message via Yahoo to GZ

Hey GrandslammerBD,

We are going to do a little test.

Boot up your computer.
Open the lid as far as it will go.
Slowly move the lid until it is nearly closed.
Slowly open it all the way up again.
Apply light torsional pressure to the top left side of the screen.
Do the same for the right side.
Tap lightly on the back of the display, approx 2/3 of the way up and off center (to the left side of the screen)

Did any of these steps produce a change in the display? Anything, a flicker/color change/fix the display (even if only temporarily)?

__________________
Please be advised. If your thread is answered and there is no reply within 30 days the thread will be closed. If you need continued assistance after that, please PM myself or another staff member to have the thread opened. Thank you.
GZ is offline   Reply With Quote
Old 11-20-2010, 09:23 PM   #3
Registered Member
 
Join Date: Feb 2008
Posts: 244
OS: Windows XP



No unfortunately it made no difference the screen still displays the white screen with colored lines and no change in display occured! What else can I try?
__________________
GrandslammerBD is offline   Reply With Quote
Old 11-20-2010, 09:28 PM   #4
GZ
Team Manager
- Hardware
- Microsoft Support
 
GZ's Avatar
 
Join Date: Jan 2010
Location: New Jersey
Posts: 25,089
OS: Windows 8 Professional x64

My System

Send a message via AIM to GZ Send a message via Yahoo to GZ

I was trying to ascertain if the display cable was damaged or loose, which could be causing the white screen.

You mentioned earlier that the display was fine when the external monitor was plugged in... Were you referring to the external monitor or the internal display?

If the latter, I would like you to download and install the latest video drivers from the HP support site.
__________________
Please be advised. If your thread is answered and there is no reply within 30 days the thread will be closed. If you need continued assistance after that, please PM myself or another staff member to have the thread opened. Thank you.
GZ is offline   Reply With Quote
Old 11-21-2010, 04:21 PM   #5
Registered Member
 
Join Date: Feb 2008
Posts: 244
OS: Windows XP



I was referring to the external monitor! The internal display still had the white screen with colored lines! I have updated to the latest video drivers on the HP website and the problem still persists? Any other ideas?
__________________
GrandslammerBD is offline   Reply With Quote
Old 11-21-2010, 04:26 PM   #6
GZ
Team Manager
- Hardware
- Microsoft Support
 
GZ's Avatar
 
Join Date: Jan 2010
Location: New Jersey
Posts: 25,089
OS: Windows 8 Professional x64

My System

Send a message via AIM to GZ Send a message via Yahoo to GZ

Yes, I do have other ideas. Thanks for the clarification. Since the display is fine on the external monitor but is not on the internal monitor your issue is with the display cable or the LCD display itself.

Are you comfortable disassembling your laptop?
__________________
Please be advised. If your thread is answered and there is no reply within 30 days the thread will be closed. If you need continued assistance after that, please PM myself or another staff member to have the thread opened. Thank you.
GZ is offline   Reply With Quote
Old 11-22-2010, 01:50 PM   #7
Registered Member
 
Join Date: Feb 2008
Posts: 244
OS: Windows XP



Yes i am willing to take it apart if necessary. Should I try taking a look at the display cable? How do I go about doing that and what exactly does it look like?
__________________
GrandslammerBD is offline   Reply With Quote
Old 11-22-2010, 02:20 PM   #8
GZ
Team Manager
- Hardware
- Microsoft Support
 
GZ's Avatar
 
Join Date: Jan 2010
Location: New Jersey
Posts: 25,089
OS: Windows 8 Professional x64

My System

Send a message via AIM to GZ Send a message via Yahoo to GZ

Here is a link to the maintenance and service manual for your laptop. It will provide some insight as to what is involved. Read it through before you begin.

The LVDS cable (video cable) runs from the motherboard (on the left side under the button cover) and through the left hinge opening into the display housing. In the display housing it splits. One small cable connects to the inverter and it then flattens out into a ribbon that is taped to the back of the display until it terminates at the LCD's control board.

The first connection you want to check is the motherboard connection. This is the connection that usually becomes loose or misaligned. There should be a little plastic tab you can pull on. Pull gently straight up until the cable disengages. Check the connectors for any signs of damage or corrosion then attach the cable to the socket again and make sure it is fully seated.

The next place you want to check is by the hinge for cable damage. You will be looking for pinched areas or general fraying. The constant movement in this area can weaken the cable over time until it fails.
__________________
Please be advised. If your thread is answered and there is no reply within 30 days the thread will be closed. If you need continued assistance after that, please PM myself or another staff member to have the thread opened. Thank you.
GZ is offline   Reply With Quote
Old 02-07-2011, 07:51 AM   #9
Registered Member
 
Join Date: Feb 2011
Posts: 1
OS: xp



Quote:
Originally Posted by gavinzach View Post
Hey GrandslammerBD,

We are going to do a little test.

Boot up your computer.
Open the lid as far as it will go.
Slowly move the lid until it is nearly closed.
Slowly open it all the way up again.
Apply light torsional pressure to the top left side of the screen.
Do the same for the right side.
Tap lightly on the back of the display, approx 2/3 of the way up and off center (to the left side of the screen)

Did any of these steps produce a change in the display? Anything, a flicker/color change/fix the display (even if only temporarily)?


WOW!! it worked for me although my problem was not white patch but red spots.. Initially i thought it was a joke :) Grt soln.. thanks
__________________
yashasj is offline   Reply With Quote
Old 02-16-2011, 02:34 AM   #10
Registered Member
 
Join Date: Feb 2011
Location: Davao City, Philippines
Posts: 1
OS: Windows 7 Ultimate



Quote:
We are going to do a little test.

Boot up your computer.
Open the lid as far as it will go.
Slowly move the lid until it is nearly closed.
Slowly open it all the way up again.
Apply light torsional pressure to the top left side of the screen.
Do the same for the right side.
Tap lightly on the back of the display, approx 2/3 of the way up and off center (to the left side of the screen)

Did any of these steps produce a change in the display? Anything, a flicker/color change/fix the display (even if only temporarily)?
komawa (thank you) gavinzach!!! i had the same problem and i was thinking of replacing my LCD but thanks to this forum! the test worked for me! i don't need to spend $$ :) thanks again! ^_____^
__________________
zeeus is offline   Reply With Quote
Old 08-14-2011, 05:53 PM   #11
Registered Member
 
Join Date: Aug 2011
Posts: 1
OS: vista



Quote:
Originally Posted by gavinzach View Post
Hey GrandslammerBD,

We are going to do a little test.

Boot up your computer.
Open the lid as far as it will go.
Slowly move the lid until it is nearly closed.
Slowly open it all the way up again.
Apply light torsional pressure to the top left side of the screen.
Do the same for the right side.
Tap lightly on the back of the display, approx 2/3 of the way up and off center (to the left side of the screen)

Did any of these steps produce a change in the display? Anything, a flicker/color change/fix the display (even if only temporarily)?
My screen started flickering Friday night. When I found your advice Saturday it stopped flickering for a few minutes after doing your test. Sunday morning it was flickering again, I did your test again and it has stopped flickering, hopefully for good.

My question is - what happens during your test?

Thank you for your time. Just trying to understand what could be wrong, or was wrong.
__________________
jdavis3801 is offline   Reply With Quote
Old 02-23-2012, 07:48 AM   #12
Registered Member
 
Join Date: Feb 2012
Posts: 1
OS: Vista



Quote:
Originally Posted by gavinzach View Post
Hey GrandslammerBD,

We are going to do a little test.

Boot up your computer.
Open the lid as far as it will go.
Slowly move the lid until it is nearly closed.
Slowly open it all the way up again.
Apply light torsional pressure to the top left side of the screen.
Do the same for the right side.
Tap lightly on the back of the display, approx 2/3 of the way up and off center (to the left side of the screen)

Did any of these steps produce a change in the display? Anything, a flicker/color change/fix the display (even if only temporarily)?
Hi there Gavinzach,

Thanks for the explanation! My LCD is displaying red dots, but when I start moving the lid towards the closed position (about 30-40 degrees from closed) I can see the red dots fading and the screen becoming perfect again. I have tried your suggestion above for a couple of times now but no luck so far. Since you know what seems to be the issue, do you know if there's some hardware solution for this? Like soldering/rewiring any cable that's causing this? Or does it have to do with the LCD grid array?

Thanks,

__________________
Surreal2010 is offline   Reply With Quote
Reply
Gear in this thread

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is on
Smilies are on
[IMG] code is on
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Post a Question

Gear in this thread


» Site Navigation
 > FAQ
  > 10.0.0.2


All times are GMT -7. The time now is 04:35 PM.


Copyright 2001 - 2014, Tech Support Forum

Windows 7 - Windows XP - Windows Vista - Trojan Removal - Spyware Removal - Virus Removal - Networking - Security - Top Web Hosts