Help! No Delay BIOS install

[ianoid]

Hi,

 

I am installing this Console 5 no delay bios and having a little trouble.

 

I followed these instructions:  https://console5.com/wiki/Colecovision_BIOS_Replacement

 

After completing the install, the picture has gotten badly distorted. I can tell even through a good deal of distortion to the picture that the No Delay works when I push a button at the title screen. Previously the unit worked with the original ROM. I actually took the unit apart to fix the power switch and decided to install the BIOS upgrade. 

 

Here are some pix, which show the two jumpers I installed (Blue) and the two cut traces as per the install. In fact, the traces on the bottom of the board at were already cut and had been bridged with some wire. I removed the bridging wire (which looked like some through hole leg pieces).

 

Oddly, this unit came to me with a ROM socket and the red jumper wires already in place. The ROM installed was smaller than the socket. 

 

Any suggestions to get the picture back without giving up on the No Delay ROM?

[Kamshaft]

 

From the photos (hard to see) make sure you cut the traces on both sides of the middle pad.

 

[NIAD]

Can’t help re your issue, but remember to place a screw in the hole above the cartridge connector. Numerous uograders don’t replace this screw and it causing grounding issues that affect Penguin Adventure by Opcode Games and posssibly other games.

[ChildOfCv]

If it's a bad picture but you can see that the game is running, then your BIOS is likely installed correctly.  You mentioned the power switch.  Look closer at it again.  Without a good 12V to the video modulator, you won't get a good picture.

[Kiwi]

Seems like the VRAM 4116 chip needs to be pressed into the socket more.  I believe that's where the CHAR table goes.

[ianoid]

Thanks for the suggestion. I cut both of the traces and then the mod worked fine. 

 

Ian