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Thanks for the answers and the diagram ! I had a confusion between the AY-3-8900-1 and the AY-3-8914.... I should have looked on this diagram before beginning. I just guessed it was this one to replace. I stupidly desldered the chip, et resoldered it after trying. So later I figured out it was the STIC in the center after removing them one by one. Now everything works fine, the mod is easy but I should have looked to the diagram !

I realized that I did the wrong swap initially, I thought I had to replace the sound chip, what a stupid mistake... I think my sound chip has gone bad

Hello, I have modded mine with the Crystal and AY-3-8900-1 chip, but it was just a messy image without sound. Now I reverted back to initial components, but I have another problem. The console takes some time to initialize first then the game works, then progressively the sound disappears. When I let stay off for while the sound comes back, but disappears progressively with some sound bugs, no graphical glitches same steps. What do you think is my problem ? I have found the crystal with some leakings, and maybe I have touched something while removing the chip with the heat gun ?

I didn't make the mod myself actually, I bought it already done. The daughterboard is completely removed yes. I think it's worth trying. Do you know where I can buy AY-3-8900-1 chips ? I want to avoid wasting an NTSC intellivision (plus shipping fees) to get one

I have successfully installed the Sophia board on my A5200 with 8din cable a mini jack for audio, really grateful !

My Intelllivision has been modded to RGB from Secam, so I guess the signal is not Secam anymore, does it change anything ?

Hello ! Do you know if this mod works with SECAM Intelliivisions ?

Hello, Great job ! Is it possible to order one for my 4 ports 5200 ? Is it the right thread for that ? Thank you

Hello ! I have received mine ! works perfect ! thank you !

cased lynx 2 too thanks

Hello, please add me on the list ! Thank you

Hello, just ordered mine from France, I hope it will do well