Solved

Compaq Pesario F700 screen failure or inverter?

Posted on 2013-01-16
4
342 Views
Last Modified: 2013-03-15
The screen starts off red and then goes real faint and very visible.

How do I know if it is the led screen or the inverter?

Thanks.
0
Comment
Question by:WrightNetDesigns
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 2
4 Comments
 
LVL 92

Accepted Solution

by:
nobus earned 500 total points
ID: 38786187
that looks like the backlights are dying

find info for testing here :  http://www.lcdparts.net/howto/default.aspx

btw  you are wrong  -  a LED screen does not have an inverter, only an LCD screen has one
0
 
LVL 43

Expert Comment

by:Davis McCarn
ID: 38787195
The classic cause of wrong colors is a loose connector which will also cause the backlight to cut off.
Here is the maintenance manual: http://bizsupport1.austin.hp.com/bc/docs/support/SupportManual/c01295900/c01295900.pdf
The display connector is in the rear left corner and you should be able to reseat it after you remove the switch cover.
If that doesn't fix the wrong colors issue, try an external monitor (Have it plugged in and turned on when you turn on the laptop)  If the monitor is OK, I'd replace the display cable first.
http://www.battery-adapter.com/product_info.php/products_id/4106/vF700
If the colors stay wrong on an external monitor, the systemboard in the laptop is on its way out.
FYI, the LCD has a flourescent bulb that looks like a piece of spaghetti inside the bottom of the LCD panel.  The inverter supplies the high voltage to light that bulb.  When the inverter goes bad, the backlight blinks out; but, you can still see everything if you shine a light on the LCD at a shallow angle.  When the bulb goes bad, the screen gets dimmer at it's brightest and the backlight generally appears uneven.
0
 

Author Closing Comment

by:WrightNetDesigns
ID: 38987128
Yes the bulbs where on the way out
0
 
LVL 92

Expert Comment

by:nobus
ID: 38988055
may i ask why the B grade then?
grading is not like at school - see the help files on closing questions please
0

Featured Post

Save the day with this special offer from ATEN!

Save 30% on the CV211 using promo code EXPERTS30 now through April 30th. The ATEN CV211 connects a laptop directly to any server allowing you instant access to perform data maintenance and local operations, for quick troubleshooting, updating, service and repair.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Before accusing the battery of being bad be sure to test if the Power Adaptor is working properly. Click Here(http://www.experts-exchange.com/Hardware/Laptops_Notebooks/A_3413-Check-Laptop-Power-Adapter-Voltage.html) . From the first time you ch…
In this article you will get to know about pros and cons of storage drives HDD, SSD and SSHD.
Although Jacob Bernoulli (1654-1705) has been credited as the creator of "Binomial Distribution Table", Gottfried Leibniz (1646-1716) did his dissertation on the subject in 1666; Leibniz you may recall is the co-inventor of "Calculus" and beat Isaac…
Are you ready to implement Active Directory best practices without reading 300+ pages? You're in luck. In this webinar hosted by Skyport Systems, you gain insight into Microsoft's latest comprehensive guide, with tips on the best and easiest way…

749 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question