Started noticing the problem in Subject. Opened the Monitor Cover & found, if I lift up and hold the Circuit Board corner near the Screen Focus / Brightness Adj. control, the display is back to normal. I suspect a Dry solder / Broken Solder contact. Do not exactly know which point to re-solder. If anyone know which point(s) to re-solder it would be great. Otherwise I need to re-solder all the contacts in that corner/area of the Circuit board.
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Re: White Sharp Horizontal Streak on Center Screen
Although it's difficult to pinpoint which solder point(s) are the cause of a problem of this nature, the use of a magnifying glass will help you determine which solder point(s) look "irregular" compared to the other ones. Look for cracks or pits across the solder point and re-solder once found. Sometimes a hairline of solder is shorting out two points and again is might not be possible possible to see without magnification. If you don't notice any irregular solder points, a component could be causing the problem (like a very dirty/oxidized potentiometer or a cracked discrete / SMD). Let me know if this helps.
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More than likely it's the lcd screen and will have to be replaced. I
could be the video card, but most likely the lcd screen especially when
you can put pressure on the screen and cause changes. To isolate the
problem try connecting another monitor to the computer. Borrow a
monitor from a neighbor, friend, relative or co-worker and connect it to
the laptop. If the Borrowed monitor displays ok, then the problem is
with your lcd screen and the video card is ok. If the Borrowed monitor
displays the same as your lcd screen then the problem is with your video
card inside the computer.
Plug in an external monitor and see if the
display shows up on it. It can be any kind of monitor even the old big fat crt
monitors as long as it has a vga cable to connect to your computer's vga
port. If so that proves your video card is ok. The video will show
on most systems when you reboot without you having to do anything. Some systems
will require you to hit the FN (Function key) + F1 thru F12. Hold down
the FN key then hit the correct key for displaying on the monitor (F1 thru
F12). The correct key will normally have CRT/LCD on it or it will have
the icon of a display.
Once you narrow it down to the lcd screen as being the problem
you might try taking the lcd screen apart to reseat the lcd cable on the
back at the top of the lcd. Just unplug it and plug it back into the
connector. You can also try doing the same where the lcd cable plugs
into the motherboard. Just pull it out and put it back.
Read Each Step Completely - Make Sure 3 Color Guns Are Off And Cool - ---------------------------------------------- 1. Remove Rear Dust Cover
2. Remove the Front Speaker Cover May be Held In By Plastic Pins and or Anchors on the Bottom Note" - Remove The Plastic Cover Just Above Speaker Cover Maybe 2 Piece.
Remove The Screws Holding Top Of Speaker Cover. Then Pull Toward You the Bottom Maybe Anchored So Lift Up.
4.Once Speaker Cover Removed, May Have Screws Just Below Center Plastic Cover Remove Them, Now Remove Center Cover Between Speakers -NOTE" Do Not Touch, Move Any Color Convergence KNOBS" - Lift Front Screen UP - Towards Roof - It Has 3 Flex Grab Anchors On Top And 2 Pins One On Each Side Of TV Frame. - NOTE" Lay Screen On Floor It Is Plexi Glass So It Will Brake If Bent Or Drop Hammer On.
NOTE"- May Have To Remove plastic Cover Frame positioned Around Front Screen And Then Remove Screws.
5. I Use Windex Glass Cleaner And Either Cotton Balls Or White Tube Sock On Color Gun Lens Covers And Clean Mirror Like The One In Bath Room.
6. Take White Sheet Or Bead Spread And Anchor On top Of TV With Weights, Stretch Around Each Side Of TV Use Chairs To Anchor On Each Side Of TV. Place Dust Cover Or Heavy Card Board Where Plexi Glass Was Positioned.
7. Turn On TV - go To Rear and Now You Can Adjust Colors Brightness And Low Light - High Light - Horizontal - Ect....While Looking at Picture.
8. Install In REVERSE - Order Just Wipe Color Guns Lens Last. Note" - If you have Wet/Dry Vac or Fan Or Blow Dryer Take A 2 - to - 3 Inch Paint Brush And While Brushing Circuit Boards Any Dust For That Matter Blow Dust Off And Out Even Brush Speaker Cover"...ECT...Do This Before Any Cleaning
9. Just A Thought If You Ever Want to Change Color Gun Cooling Oil - Wrap All Circuit Boards With plastic Bags And then I use Bath Towol And Paper Towols To Catch As Much Spill As I Can And Then Spray With Windex To Make Dry While Blowing Air Onto Spill - Also I have Found Clear Mineral Oil Like Johnson Baby Oil To Work As Well If Not Better Then Glycol Oil. I Get For $2.50 For 20 Oz Bottle.
try updating the latest driver for your video and bios. try connecting your laptop to external monitor if both of this didnt solve your problem, i suspected you lcd screen is faulty and need to replace.
If your LCD monitor has damage it could be in three forrmats:
1) Damage LCD ribbon. The screen will power up bright white and you will see random strings of color in diaganol or horizontal streaking slowly across your screen.
2) Damaged Liquid Crystal Container. The thin glass/plastic may have ruptured due to an impact on the screen. You will see sharp jagged lines and maybe a partial post screen, but where the sharp "jaggies" are, are now permantly broken
3) Nothing on screen. This indicates that your internal CCFL (oh I love LED technology) tubes have now lived their life and will not ignite. To test this method, hold a very bright light to the screen and see if you can see any logos (Compaq/HP/Win Xp loading screen...etc)
If you can see something, your screen is fine, but there is no light behind it for you to see.
I found in the refuse, a Gateway FPD 1520, 15" LCD monitor that started off losing the screen half-way, losing sync, etc. The "mechanical agitation" method was applied and remedied the problem. Awhile ago, it went to a white screen (or, as it was back in the day- a clean raster). I opened it up and found that the ribbon cable on the left was loose. I applied a series of layers of adhesive-backed foam (the kind you stop drafts in your home with) until it was greater than the height of the metal enclosure to put pressure on the unbehaving connector. It does seem a bit loose and this will keep it snug. Maybe hot glue or other adhesive if it wiggles loose again. Seems to have solved the problem at the moment.