Question about Sharp 12.1 in. XGA TFT Active Matrix Laptop LCD Screen

1 Answer

No display on laptop screen

Do you have any kind of wire/shematic diagram i can work of to see which cables do what inside the screen

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  • dan1984 Feb 11, 2008

    Thanks for the advice but it does not appear to do anything. My laptop works on a external monitor but not the actuall laptop screen which is a Sharp 12.1 inch tft.

  • Anonymous Oct 09, 2008

    it cannnot dispaly when put on but external monitor connected to it display

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Have you tried presseing your function key and F2? This will toggle your displays on and off. It is generally used for when you have an external monitor and would like to switch video between the monitors.

Posted on Feb 09, 2008

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SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

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Posted on Jan 02, 2017

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My compaq presario cq62-238dx felloff my hands, no scratches or damages are visible, when I first turned it on it worked as if nothing would have happenned, but later on the screen turned pink, the next...


I suggest you start diagnosing by using an external monitor, if available.
A VGA monitor.

(It can be a VGA monitor that looks like a small TV, {CRT}, or an LCD flat screen that has a VGA cable attached.
More information on VGA connectors,

http://en.wikipedia.org/wiki/VGA_connector

Laptop off, and VGA monitor off, connect the VGA cable of the monitor to the Left side of the laptop.
(Rear top port)

Turn the monitor on, and then the laptop.
Do you see a display on the external monitor? (VGA monitor)

No?
Press, and hold down on the Fn key (Function Key), and tap once on the F4 key.

A) If BOTH the external monitor screen, and the laptop screen have the same pinkish display, the problem is the graphics chip. (More on graphics chip in a moment)

B) If just the laptop screen is pinkish, and the external monitor graphics are okay, the problem is inside the laptop display.

1) Could be a loose connection of the Display Panel Cable.
{The Display Panel Cable attaches to the motherboard, and the LCD screen in the laptop display}

2) Could be a bad Display Panel Cable.
Possible damage to the Display Panel Cable is the the laptop display was open.

Look for signs of damage to the sheath of the Display Panel cable.
However the damage may not be apparent. The Display Panel Cable could have been stretched.
(Laptop display open when dropped)
The tiny wires inside the Display Panel Cable could have become damaged.

Testing requires that the Display Panel Cable be removed.
A multimeter is used to check continuity of each wire.

{Multimeter function knob is set to Ohms. 1K or 10K if these settings are available.
The Positive probe lead (Red) is touched to a wire at one end of the Display Panel Cable.
The Negative probe lead (Black) is touched to the other end of the wire.

Analog multimeter needle swings up, you have continuity. Don't worry about the Ohm reading at this point. As long as the needle moves.

No movement? Have a helper gently move the Display Panel Cable around.
See if there is continuity shown, or is intermittently shown.
Indicates a break in the wire.
Solution is to replace the Display Panel Cable.

Same with a digital multimeter. No reading, or intermittent reading indicates a broken wire.

Display Cable Kit - HP Part Number 595196-001
I have seen several listings on the internet.

3) Could be a bad LCD screen.

Check the connections.
Check the display panel cable
If this checks out okay suspect the LCD screen.

Compaq Presario CQ62-238dx Notebook PC - Service Manual,
(Free from HP Support),

http://h10025.www1.hp.com/ewfrf/wc/manualCategory?cc=us&dlc=en&lang=en&lc=en&product=4252487&

Left-click on -
Compaq Presario CQ62 Notebook PC and HP G62 Notebook PC - Maintenance and Service Guide

This is a PDF file. (The computer you are using now has Adobe Reader on it, which uses PDF files)
It may take up to 30 seconds before the first page comes up.
It may also take additional time for the file to fully download.

In the Bookmarks menu on the left, click on the + sign to the left of Removal and replacement procedures.
Now click on the + sign to the left of Preliminary replacement requirements, then go on to Component replacement procedures

For additional questions post in a Comment.

Regards,
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1 Answer

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Hello,

To replace the the LCD screen of your laptop, You need to be very careful in replacing this screen. Please kindly follow the steps below to be able to guide You in replacing the screen.
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  7. Remove the front cover from the laptop with your fingers.
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  12. Reconnect the LCD ribbon cable to the back of the new screen.
  13. Align the screw holes on each side of the screen with the screw holes on the metal framing inside the display panel.
  14. Replace the LCD screen's retaining screws.
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That is how to replace the screen of your phone.
Hope this was helpful. Thank You for using FixYa!!

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1 Answer

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Nice to know. So what is the problem?




OH I'M JUST KIDDING!

See if the Display Cable has a loose connection.
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The Display Assembly consists of the Top Cover, Bezel, LCD Screen assembly, Inverter, Display cable, and often the Wireless Antenna, and it's connecting cable.

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Hi,
ManualsBack to Contents Page
Display Assembly and Display LatchDell Inspiron™ 6000 Service Manual
Display Assembly
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Display AssemblyRemoving the Display AssemblyCAUTION: Before you perform the following procedures, see the safety instructions in the Product Information Guide.NOTICE: To avoid electrostatic discharge, ground yourself by using a wrist grounding strap or by periodically touching an unpainted metal surface (such as the back panel) on the computer.NOTICE: To avoid damaging the system board, you must remove the main battery before you begin working inside the computer.
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