Hyper NeoGeo 64 Boot Problem

[gadgetguy56]

Concerning a sit-down Hyper NeoGeo 64 Road's Edge...

This was an intermittent problem but is now on ongoing problem; after powering on the game the following appears on the screen and does not finish booting:

Scroll ram OK
Pallete ram OK
Main dual port ram OK
Communication dualport ram checking ....

I have done the usual cleaning of contacts and checking power supply voltages. Any suggestions on how to proceed?

 

[Xian Xi]

Make sure the cart is seated properly. Push down with with both hands at the same time. Did you change any settings lately or remove and harnesses or jumpers?

 

[gadgetguy56]

Make sure the cart is seated properly. Push down with with both hands at the same time. Did you change any settings lately or remove and harnesses or jumpers?

The cartridge was removed, contacts on cart and board cleaned; harness connectors removed and checked; board connectors checked for cracked solder joints; muffled screams with pillow.

Wondering if ROM is bad will it hang or report as bad?

 

[Xian Xi]

You would get an error if a rom failed. The system check is failing before it even gets to the rom check.

 

[Neo Alec]

I was surprised to learn you need to wire some stuff on the communication port to get the driving board to work from your site, Xian Xi.