help with flickering lilliput 701 touchscreen in dash

**poza** · 10-27-2008, 07:50 AM

hi,
i have a car pc with lilliput 701 vga touchscreen in dash
and i have a flickering problem (when the car is on or off its the same)

- refresh rate is set to 72Hz.
- the length of the vga cable is 5 meters.
- (+) power cable is passing next to the vga cable from the battery (+fuse) to the power supply.

what can cause this problem?

what i need to check ?

**blackcobra487** · 10-27-2008, 08:39 AM

If the display is using a CCFL backlight, it could be that it's cold

Edit: It could be that your power cable is near your VGA cable as well.

**DeltaFX** · 10-27-2008, 11:47 AM

Try moving the power line away from VGA cable. There may be special concerns about how shielded is this vga cable

**poz** · 10-27-2008, 03:11 PM

i verified that the problem is not on vga
using a 12v 1.4amp battery connected to the acc and the battery
the screen looks good without any flickering so the problem must be
unstable (+) ..
im sure im not the first one with this problem
what do you think i need to check \ do ?

**DeltaFX** · 10-29-2008, 05:54 AM

If I understand, your puter is in the trunck so there's a 5 meter vga/usb/... cable. But how's your screen powered?

Direct from the batt with a short cable (batt->fuse->(POL)->screen) ? or from your carputer's PSU (Batt -(5m)-> psu -(5 m)-> Screen ?

Where is your scren grounded ? What are the +,- cables gauge ?