FromJapan proxy did very bad packaging this time, but luckily the disk seems to play, so not broken.
But bad luck continues, now Victor HC-7 power supply died. It worked just fine week ago. Replaced all electrolytic capacitors, but no power. Diodes seems to ok, and rectifiers.
Anyway had to test cartridge version in Sanyo SPC, but it seems something is not right. _VP commands can be give successfully, but it acts like the cable is not connected to VHD player. Now i tried with that slot adapter+IF C9D and it controls VHD player in this Sanyo.
Nice idea but what can I do 
Colleagues probably have more opportunities 
yes, it was that CLK signal reason. Also had to put 74H004P instead of normal 74LS04.
updated pcb: https://github.com/popolonx/MSX_STUFF/blob/main/vdh_cartridg...
@popolon_
Can you help me with what I wrote above?
I will be very grateful.
Managed to get Victor HC-7 power supply back from the dead (it was broken Q3=B744 transistor). Also the cartridge port microswitches were not in good shape. Does anybody know where to get replacement switches?
I made RGB21 to SCART cable so that in RGB21 side there is separate RCAs for video/audio inputs. So that the VHD player picture can be get in.
At least when i had megaflashrom (with 512MB ram) in SIDE cartridge port and my VHD control cardridge in back slot, Thunder storm game worked fine. The game does not need any patch to work (patch was needed only in Victor HC9x + IF-C9D case).
But had to stop the player before starting the game (or disable autoplay in VHD player side). Both VHD player picture and MSX generated picture are seen in TV output. Only annoying problem is that the picture signal levels are not good or something, as for example MSX generated texts are not so readable.
I already changed all electrolytic capacitors. The potentiometer at the back does not change anything, so is that for VCR/REC connection ? RCA inputs are connected straight to RGB21 pins (appropriate pins 1,3,5,7,9).