Build Your Own Arcade Controls Forum

Main => Monitor/Video Forum => Topic started by: rob1234 on April 14, 2017, 08:50:59 pm

Title: Konami GTI Club monitor issue
Post by: rob1234 on April 14, 2017, 08:50:59 pm
I have a GTI Club driving game with the force feedback electric steering. Whenever the electric motor kicks in the screen scrambles on the monitor. I have converted the game to a LCD screen and tested 2 different monitors. The game plays and displays fine if I disconnect the motor after the game boots. Any ideas on how to fix the issue?
Title: Re: Konami GTI Club monitor issue
Post by: grantspain on April 15, 2017, 04:42:33 am
where are you getting the power for lcd from?
do you have ferrite shields on the vga leads,motor power,how are converting the 25k signal to 31k-where are you getting the power to supply a converter if using one
Title: Re: Konami GTI Club monitor issue
Post by: rob1234 on April 15, 2017, 08:12:57 am
I am using a converter board which is being powered by a hacked computer power supply.
Title: Re: Konami GTI Club monitor issue
Post by: mourix on April 16, 2017, 08:38:46 am
Force feedback uses a big motor to knock the steering wheel from your hand. Resulting are a big spike on the power supply, and a strong magnetic field as the motor ramps up. Both can really interfere with your lcd.

Step 1: Play with the position and shielding type of your vga cable to see if there is any magnetic coupling ruining the high bandwith VGA signal.
Step 2: Check the power supply. As you are using a seperate computer supply, the spike could come through the ground line.

The vga cable interference possibility is most likely, though.