Question about Panasonic Toughbook 28 Notebook
I have a CF-28 Toughbook (1) and today the LCD went dark. I tested the LCD on another CF-28 (2) and the LCD works perfectly on it. I also checked the second Toughbooks LCD screen on the First on and it also was dark. To summarize; Both LCD screens work on Toughbook 2 but niether work on Toughbook 1. I can see and image on Toughbook 1 but I need to shine a light on it to do so.
On all Panasonic Toughbooks, any model pre-2008/2009 would have the older LCD screen with an "inverter". The new screens are called LED because there is no inverter.
The inverter is like the "ballast" on a fluorescent tube lighting fixture. The tube could be good but if the ballast is blown then the tube will not "light-up". This is also true of the inverter.
You can also tell when the inverter is about to burn-out when you first start your toughbook in the morning and the screen is initially "red" and then turns white after the unit warms-up for a few minutes.
Good Luck to you.
Regards from Richard, Montreal Based Panasonic Canada Authorized Toughbook Dealer since 1989.
Posted on Nov 02, 2017
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Posted on Jan 02, 2017
Here you , this is a step by step disassembly guide with pictures
Its for a Toughbook CF-50 but it should be similar as theres not too much difference in the model number
Posted on Jan 04, 2009
i'm not sure what your configuration was in the computer before you tried installing the extra memory, but here's some common problems i see.
-it might exceed the maximum amount of memory that can be recognized in each slot or total for the computer
-it might have be installed in matching pairs (if it is a 2 memory slot machine which most are).
-it might not take that exact speed/rating
hope that helps
Posted on Jan 16, 2009
You most likely have a defective screen - a defective inverter or a CCFL lamp or simply the video cable needs reseating. After reseating the video cable and the problem is still there then :-
To determine if you have a LCD screen or video card problem, read this and follow the instructions.
Defective CCFL backlight, it may have the following symptom:
Connect an external monitor to your laptop and power it up, if you see the normal Windows images then the video card and laptop is OK and the problem is definitely the backlight.
Dim image and/or dark display on the laptop's LCD screen indicates a faulty LCD backlight and it could be the inverter that supplies high voltage to the CCFL lamp or it is the CCLF lamp is nearly burnt out or burnt out, most likely this is the case.
The inverter can be replaced easily but the CCLF lamp is more time consuming and requires soldering skills.
Check out www.lcdparts.net for parts, repair service and DIY info.
Posted on Jun 02, 2009
1 - Using a stack of DVD RW blank disks, or a large capacity USB Flash/Jump Drive, back up your Laptop computer completely. If necessary, Use WinZIP to ensue that everything has been compressed into the smallest capacity possible.
2 - When you are certain that you have backed up the drive completely, remove the older drive
3 - Line up the new drive and the old drive and ensure the jumpers are set to the same settings as they were set on the older HDD.
4 - Once you are sure, you then restore everything from the back-up drive for the old hdd to the new disk drive.
5 - Test to ensure that everything from the old drive has been backed up from the old drive to the new drive.
6 - If you are comfortable that your backup has been completly restored from the backup meda to the new, larger hard drive, then be certain that you have restored from the older drive to the new drive, tighten all screws and cables, then close all ports and ensure that everything has been done properly by and for you.
7 - Be certain that you have created the same user accounts in the new drive as you had on the older drive.
8 - Now, power off the new drive while in the laptop. Wait about 30 seconds to one minute, then restart the new hard disk drive.
9 Test everything, to be sure that everything works properly. Go through everything from the top of the menu to the bottom of the menu. Try all accessories, try all applications. Ensure that all works right and that the applications work as they used to work, when it was on the old drive.
10 - Remember, you have a warranty on the new HDD, so be sure that you have tested everything to ensure that it all works properly, before you sign off on this new drive.
11 - Once you are certain that it all works correctly, you can then be sure that it is working properly and competely, because only you know if things are working correctly as they should be.
12 - Then you can sign off and you can be sure that things work properly.
13 - As carpenters say ... measure twice; cut once. You can only do this one time, so if you measure it more than one tim, you can be certain that you will get it done correctly and be happy that you did it right. from beginning to end.
Have fun. Don't be too serious about it, but do be careful, and get it right. Remember, get it right the first time, and you will be pleased with the results at the end.
Posted on Jun 22, 2009
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