Grid Mobile backlight not working

Symptoms:
On certain machines when you are running GridMobile and switch off the device, a blank white screen sometimes briefly appears before the device switches off. When this happens, upon switching on again, you can see the grid only very faintly. The backlight does not turn on. The grid responds correctly to cell presses, but is hardly visible.

This problem has only been reported on HP Ipaq 214 - please call Smartbox if you see this fault on other devices so we can track the problem.

To turn the backlight on again:
If the backlight won't come on after pressing the power button leave the machine idle for the time it would take for the backlight to switch itself off had it been on ("Backlight turn-off time", usually 30 seconds to 1 minute), and then a single screen touch or button press should bring it back.

Alternatively connect the device to the mains charger or PC sync cable briefly.

Avoiding the problem:
The fault can be avoided if the user waits 15 seconds after the last screen tap or keypress before pressing the power button to turn the machine off.

Solution:
Grib mobile versions 2.2.x.081 and above have a configuration setting that can be set to prevent the problem occurring. 

In the memory card User folder there is a file called config.ini which contains device-specific settings.  Using a text editor add the following line to the [config] section of the file (if this line already exists, set the value to 0):

backlight control =0

N.B. This setting should only be used on machines that exhibit the problem.

N.B. Switch users would not be able to take advantage of the fix as it prevents the backlight turning on when a switch is pressed, however a serial-switch user probably would not be operating the power button and would therefore not be affected by the fault.

Instructions for editing config.ini:

Quit Grid Mobile.
In the memory card User folder there is a file called config.ini.  Copy this file back to a desktop computer using a sync cable or a card reader. 
Rename the original config.ini card as a backup (e.g. config.old).
Edit the file with Windows Notepad.
Save the file and copy it back to the memory card.

If you would like any help with this process please call technical support.