Question about Acer Aspire 5100 Notebook

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Aspire 5100 Recently while using my notebook, I had a problem similar to what Im reading about with the black screen. I have lights indicating hard drive is active but the screen has no activity. No blinking, no flashing, nothing. It sits as it is turned off. I also noticed that I have no keyboard control either. hitting the caps lock key does not turn on the cap key indicator light. I cannot do a safeboot, I cannot tell weather anything is loaded correctly. I checked all my connections and it seems there are no loose wires. Notebook was not dropped or nothing was spilled on it. No new programs or no new updates were installed before this. I am using Windows XP Media edition 2005, with service pack 2. No aftermarket add-ons or memory inprovements have been made. Any ideas?

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Re: Aspire 5100

First thing to do is to try to hook up an external monitor. If that works OK, you will have verified that you have an LCD display problem.
Before I can go any further, I'd need to know if there is a faint image on the LCD during operation. You may have to hold a flashlight up to the screen at an angle to see this.
As soon as you let me know, we'll continue on to the next step.

Posted on Nov 23, 2007

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White screen but plugin monitor works. is it the screen?

So you PHYSICALLY checked the connection of the Video Cable, TO the motherboard, TO the screen Inverter, and TO the back of the LCD screen?

Visual inspection will NOT do. If either motherboard connector, or LCD screen connector is loose, the width of this letter -> I < you won't see it, and it will affect the video signal.

The Video Cable connects to the motherboard under the Middle Cover, above the F4 and F5 key on the Keyboard. (Left edge of F4 key over to middle of F5 key)

[Middle Cover is Acer speak for Switch Cover. The cover strip above the Keyboard, and below the LCD screen ]


Click on the view to enlarge. Top left side connects to the LCD screen. Rectangular Black connector with thick round cable, at the bottom, connects to the motherboard. Small cable coming off at the bottom, connects to the screen Inverter ]

From the motherboard connector the Video Cable routes up under the left Hinge, and into the Display Assembly. It then connects to the screen Inverter, and LCD screen.

From normal opening, and closing of the laptop, repeatedly, the Video Cable may become pinched.
This can lead to loose connections.

It can also lead to damage of the Video Cable.
If the sheath of the cable shows apparent signs of damage, the tiny wires inside may be damaged also.

This means to ENSURE that the Video Cable is NOT the problem, a continuity test needs to be performed on all of the Video Cable's wires. (OHMS)
If an economical multimeter ($5 to $12) is not available, suggestion is to take it down to the nearest 'Mom and Pop' computer store, and have them check it. Labor charge should only be a few bucks.

Video Cable checks out it's on to the screen Inverter, for the diagnoses.

This diagnoses is for an Acer Aspire 5100 Notebook PC. Uses a single (1) CCFL for a Backlight, and has a screen Inverter. Laptops that use LED's for a Backlight generally do not use a screen Inverter]

Did you test the screen Inverter, or replace it?

Takes a sensitive multimeter. Read fairly expensive.


An LCD screen cannot produce light by itself,

Click on the monitor. Suggest start out with your audio turned down ]

It needs an additional light source.
A Backlight is the additional light source.

A Backlight can be a CCFL, (Or two of them), or a series of LED's.
(Light Emitting Diode)
The Acer Aspire 5100 Notebook PC uses a single (1) CCFL.

A CCFL is a Cold Cathode Fluorescent Lamp.
Similar to Fluorescent lighting used in homes, and businesses, but on a MUCH smaller scale.

[Average thickness is 2mm. That is a little larger than 1/16th of an Inch.
Average length is almost as long, as the LCD screen is in height, ]

A screen Inverter is used to convert the power (Electricity) from the laptop, for the LCD screen, and Backlight.

90 PERCENT OF THE TIME the fault is a bad screen Inverter.

Primer over.

If the screen Inverter is good, the LCD screen is bad.

[The LCD screen, and the screen Inverter are a MATCHED unit.
When purchasing make sure you get the correct screen Inverter, or LCD screen ]

For additional questions please post in a Comment.


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Since you have video with an external monitor your lcd panel is going out.This is not hard to repair only costly

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Video chipset fails or more frequently bad welded on the mainboard. Mainboard must be replaced, or repaired by a NASA's technician...

I had more than 40 5100 laptops in hands for similar problems...

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Your harddisk MBR sector might be damaged, google fix mbr and resetup your harddisk mbr. After that it most likely will boot.

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It sounds like video card problem. Bring it to a repair shop.

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try to reseat the memory first.
if that don't work, most of the time your mainboard is bad

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try this with only the power and not the battery just to check something out

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hmmm...anything at all on screen?

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