Micro Genius IQ-901 console, power no video?

[RetroSunday]

Hello, I've recently purchased a Micro Genius iq-901 "Handy System" console, came with a Nintendo branded RF (loose copy of Creatom) with antenna option adapter but I ended up having to use a Sega Genesis RF adapter to get it plugged in properly. The console is in decent condition, powers on, seems like it wants video to come thru but no video. I've tried several games all that are known to have worked prior to testing the system, with no luck. Took the console apart, did a quick pad, button and board clean and I'll test again tmro but if no success any suggestions? Cool to see thee board made by TXC and the shell/cartridge slot made by Micro Genius. LED mod and other suggestions will be considered

[FAMICOM_87]

What about Composite? Why you even bother with the RF?