Bill253

Hi everybody, I bought this Atari 130XE computer about a year or two ago with no power supply or leads. I noticed at the time it had a toggle switch on the back. Finally got around to looking at it. When it powers up, the red LED comes on but just getting a blank display. when I opened it up to see the mod that was done there is a daughter board connected with the original rom, an omnimon XL and a chip marked up as Cupid. The first two I know about but cannot find any information about the Cupid chip. I’ve felt all the chips to see if anything is getting overly hot it nothing. So does anyone know where the best place to start looking for the blank screen issue. I’ve heard it may be some memory gone bad but anything else? Also does anyone know what this Cupid chip is and what it does? Thanks