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Hey guys So I started the repair of my Neo Geo CD recently Had to replace the Inductor U4 and was happy that it suddenly had a picture but then it kinda had troubles reading discs. So I tried to mess around with the pots and calibrated the original laser quite well to the point were I was...

Hey guys. I recently purchased a broken MV-1A. It looked pretty good - no battery leak - quite clean but I only get a Pink Screen. When pushing around the board the color might change but ultimately I can never get through even with the diagnostic bios. I measured some of the Caps and got...

Hey friends I have another MV-1FZ which will pass all tests on the Diagnostics Bios after I replaced the Fast VRAM. I have those black vertical lines so I thought it might be LO-ROM related. So I removed my LO-ROM and put a Socket in and tried another LO-ROM with the same results. I also...

Hey Guys. So I have another MV-1FZ that makes me scratch my head. It seems to have Backup RAM Problems but as well will report a Bios Error with no real Address when trying to boot it up with a UniBios. So I checked continuity from all A and D Lines from the Work and Backup RAM to the 68k...

Hey guys - by the time I am typing this I was already able to fix the broken board that I received today. When first finding out it is a MV-1AHCX I was scared because I had no experience with this revision. Connecting it first it showed a Backup RAM Error and once the backup RAM error was fixed...

Hey Guys. I now overclocked my test rig.. which is a heavily repaired MV-1C from China. So I ordered an adjustable oscillator from aliexpress. https://www.aliexpress.com/item/1KHz-to-33MHz-Adjustable-Oscillator-Module-LTC1799/32443884225.html I first measured the stock clock which is pretty...

Hey friends.. I am facing issues with my MV-1C that was working fine but stopped playing ingame sound today. The neo geo jingle will play just fine at boot but other than that it's dead silent. Anyone ever experienced something similar ? Thanks

Hey dear friends. I thought I would start with the work I did this morning. I compiled some of the information on the Internet into a PDF mostly surrounding the Video RAM - LSPC2-A2 Area. There is a lot of information on neo-geo-dev (https://wiki.neogeodev.org) however I found especially the...

Hey guys I have a Rev 2 161 in 1 Cartridge which is working on my MV-1FZ but not working on my MV-1C. Other game cartridges work on both mainboards without issues. I tried the stability fix from neo-geo-dev already as well as the capacitor mod without any luck. It seems it freezes on the...

Hey guys. Just wanted to give a quick update on my progress in converting the RGB from the neo geo directly to HDMI without any fancy circuits. https://youtu.be/79aldZ6SzIk I used this Converter from Aliexpress and connected RGB and Sync directly from the Jamma Connector...

Dear Members.. This is my first post. My Name is Patrick and I am from Austria. I always wanted to have a Neo Geo and finally my dream will soon come true. I ordered 3x Mainboards from different places around the Interweb. All of them are MV-1FZs. However when firing them up for the first time...