Question about Sony VAIO PCG-K23 Notebook

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The video screen is unreadable and shows streaks of red, green, blue running vertically. But when I hook up an external monitor, although streaky, I can see the icons and mouse pointer. What is the problem?

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Sounds like a integrated video card failure, if it's under warranty take it back for repair, if not it will require replacing the motherboard

Posted on Aug 25, 2010

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1 Answer

Video red green blue black white


1) There's a problem with your computer or Display.
You'll need to go to a computer specialist, he/she can fix that.

Jan 09, 2013 | HEWLETT-PACKARD HP EliteBook 8540p WH253UA...

1 Answer

On my screen I keep seeing red vertical stripes. How do I get rid of this?


Hi,

You can try to hook up an external monitor. If the vertical linea are visible on the external display, try to update your video card driver. If it is not showing in the external monitor, You are having an LCD problem.

If you don't have any external monitor, go to BIOS setup and check if the lines are visible, if yes, you're having an LCD/screen problem. You need to replace either the LCD cable, LCD inverter or LCD itself.

Hope this helps.

Jul 17, 2011 | HP Pavilion dv4-1020us Notebook PC

1 Answer

My Sony Vaio PCG-K23's LCD screen shows thin red, green & blue streaks running vertically. When I hook up an external monitor, it's still streaky, but I can make out the icons and see the mouse...


SInce the same problem appears on the external monitor, you have a failing video card/controller chip on the motherboard. Had the problem been absent from the external monitor you would merely need to replace the LCD panel and the Screen Inverter.

Your next move will of necessity be to count the cost of a motherboard repair service where (1) they fix the board at the individual coponent level, (2) you replace the entire motherboard or (3), your laptop has a discrete (not soldered to the board) video card which can be replaced.

Sorry to be the bearer of bad news, but this is a serious hardware problem and not a simple driver update.

Good Luck

Aug 26, 2010 | Sony VAIO PCG-K23 Notebook

1 Answer

Shrinking of the display


The DB15 VGA (Video Graphics Array) connector contains however 15 pins in three rows of 5 pins each. These five pins carry the color and synchronisation signals, also a digital I2C interface for two-way communication between the video controller and monitor. The common 15-pin VGA connector found on most video cards, computer monitors, high definition televisions which support VGA connections. The following schematic diagram and table shows respectively connector and pin assignment of DB15 VGA.

Pin
Name
Function
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15

RED
GREEN
BLUE
n/c
GND
RED_RTN
GREEN_RTN
BLUE_RTN
VDC
GND
n/c
SDA
HSYNC
VSYNC
SLC

Red Video
Green Video
Blue Video
not connected
Signal Ground
Red Ground
Green Ground
Blue Ground
5 VDC supply (fused)
Signal Ground
not connected
DDC/I2C data
Horizontal Sycn
Vertical Sycn
DDC/I2C Clock


Aug 10, 2009 | SAMTRON 55V 15" CRT Monitor

1 Answer

Black screen with vertical lines through it


Could be faulty graphics chip or faulty screen. If you can hook up external monitor and picture is fine then probably faulty screen. If external monitor shows same problem the faulty graphics chip. Take to repair shop and let them have a look.

Jun 10, 2009 | Compaq Presario M2000 Notebook

1 Answer

I DON'T GET A PICTURE WHEN I HOOK UP MY LAPTOP TO MY TV MONITOR.


on your laptop keyboard, press function button & monitor button at the same time .

Oct 18, 2008 | Computers & Internet

1 Answer

Vertical lines in my laptop screen


I know not everyone has this ability, but if you can, go to a friend's house and hook up an external monitor to your laptop. You may need to use the function keys to switch from LCD to external, but if the lines go away on the external, you have a bad LCD. If the line shows up still on the external, then your problem is either:

a) video driver (free, easy fix)
b) bad inverter (video 'outputter') ...approximately $10-50/varies + labor costs to replace
c) bad video card/motherboard ...usually between $200-$400 + labor to replace

Hope this helps - please be sure to rate my answer :)

Sep 29, 2008 | Computers & Internet

2 Answers

Lcd monitor streaking


The solution may be one of several things. here are my ideas in increasing severity.

1) Bad connection. Fix: tear apart the screen and check the video connection. It looks just like that when you don't have a good connection with the sync signals from the motherboard

2) Bad screen. Check video feed to external monitor. Shut down laptop. Plug in an external monitor. Start it up and the external monitor should show a good picture if the problem is a connection or a bad screen. If it's a bad screen, you will need to replace it (easy to do at home for 1/3 the cost of some outside source). Go to ifixit or instructables or repair4laptop to get ideas and walkthroughs. So, good feed to external monitor and no bad connections=bad screen... maybe.

3) bad video card. Replace motherboard = $$$. this is more difficult to do at home. If the external monitor shows the same streaky picture, you're pretty much guaranteed that you will have to replace the motherboard.

try pushing on various parts of the computer to see about bad connections, usually two thirds to three quarters of the way up the back of the screen is the connection and somewhere under the keyboard is the video card. don't press too hard, but see if anything's different when you try it. Good luck.

Oct 09, 2007 | IBM 11P836402 for ThinkPad R40 Monitor

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