I have a Casio e-100 that's about four years old and I'm really happy with, but the screen backlight seems to have gone crazy. Today while I was playing a MAME ROM, the backlight started jumping in and out. I quit MAME and so then when I used pressed the screen with the stylus it would jump to super bright, and then back. Now whenever I turn it on I can see the backlight flickering- I reset the unit and it still happened. If this can be fixed without taking apart the unit I'ld be really happy.
Any help is great'ly appreciated.
- If you need clarification, ask it in the comment box above.
- Better answers use proper spelling and grammar.
- Provide details, support with references or personal experience.
Tell us some more! Your answer needs to include more details to help people.You can't post answers that contain an email address.Please enter a valid email address.The email address entered is already associated to an account.Login to postPlease use English characters only.
Tip: The max point reward for answering a question is 15.
It is possible that by holding the power button down too long, that you turned off the backlight. When you hold down the power button, a menu eventually comes up with "Backlight Off" highlighted. The easiest way to undo this, is to simply do a soft reset. Or, you can hold down the power button again, and "Backlight On" will be highlighted (if there's enough ambient light you can see this message); just tap it, and the backlight will come on again.
Also check out your backlight settings by tapping:
the tab [Battery Power] should be highlighted; adjust as desired.
Next tap the tab [External Power]; adjust as desired.
Finally, tap the tab [Brightness] and make sure the sliders are high enough.
You hit the problem on the head. If you can still see an image, albeit extremely faint, and the Casio is still working, i.e. playing an mp3 file or whatever, then you definitely have a problem with the backlight. More times than not, this is either a daughterboard problem or a connection problem (rarely have I seen an actual bulb failure though it can happen). One of the more common causes is the tiny ribbon cable connector on the daughterboard. You might try to disassemble it, clean the contacts of the ribbon and reassemble the device.
I've also heard of people squeezing in the side of the case to temporarily effect repairs...this is normally more ominous.
Well, there is good news and bad news....
The good news is that your digitizer is working okay...the bad news is that you lcd isn't.
This is due to three possibilities...
1. The video controller on the motherboard is bad...unlikely
2. The ribbon cables or connectors that attaches the lcd to the motherboard is bad...possible but unlikely
3. The lcd itself is shot or damaged...seen it more than once.
The only way to really tell is to find someone else with another unit and just start swapping out pieces until you can rule out the trouble.
Or in the interim, it is possible that the cable just jarred loose a little or has become dirty, preventing full contact. Simply disassemble the thing, clean the contacts, and put it back together...not hard to do, but not for the feint of heart either.
Good luck, hope you get it fixed.
p.s. Don't be afraid to take it apart...what can you loose, just be very careful to document each step if you haven't done it before. I've done it a couple of dozen times on various Casio E-1XX machines and never had any problems yet....
Pretty common problem, and is normally one of three possibilities:
1. Ribbon cable that connects the backlight daughterboard to the motherboard connector has gone bad, or contacts oxidized.
2. Daughterboard itself has gone bad...
3. Power problem or cpu problem not activating upon powerup. Not as likely.
4.The fluorescent tube itself may has blown.
The cure: carefully disassemble your 125, clean the ribbon contacts on both ends of the tiny ribbon cable, be careful, it is very fragile.
If that doesn't work, find someone who has a E125 and swap out ribbon cables and see that works, that will at least tell you if the cable is bad or not.
If that doesn't work, swap out daughterboards.
If that doesn't work, sell it for parts on EBay and buy a new one, because anything else will probably be too expensive.
Usually the ribbon cable connection that powers the backlight is the problem.If you remove the four screws in the back and take off the back cover. (note that there are two tabs on both sides of the cover half way up)You can see the white ribbon cable on the left above the battery back housing. Gently wiggle it and see if the backlight goes on. The cable is attached with a small brown insert that holds it in. It is removable so you might be able to get an electronics shop to replace the cable connection or the cable itself.
Unless a Casio technician has looked at it don't take Casio's word for it.
There is an inverter PCB which converts the DC to high frequency AC for the fluorescent back light. lamp. This is available & can be repaired / replaced.
There is also an issue with the E-125 backlighting which simply requires resoldering of a connector on the main pcb.
Then there is the fluorescent lamp itself which can go bad & may be replaced.
So DO take your device to a well equipped competent technician to look for the precise problem.
This is what I suggest:
Get yourself a new backup battery.
First backup your Casio.
Then install the main battery.
Plug the Casio in and recharge overnight.
Once recharged, install the new backup battery.
Make sure you do not touch the battery with your hands.
Use a tissue.
This should solve your problem if the Casio is not physically
There are several types of processors used - find out which yours has and be sure the software will work on that processor.
Mips are the three as I recall. I have three hand units and two different processors.