Don't know if it works because i don't have a comcypt 4000 decoder.
Hi, I have two decoders mod. Comcrypt 4000, I buy the first one in december 1995 and it works without subscription becouse in those stock there was a firmware error.
For work it the step are:
1 - You must memorize on Pr1 the channel of crypted TV; 2 - You must go on test signal programm (display show "rr"); 3 - You must disconnect the antenna cable then connect it again, now the decoder works with double audio and decrypted video perfectly (only with the scart connector).
The second one (I buy it in 1997) don't work with previous metod becouse the firmaware error is now correct. I have modify the decoder and I can see the video decrypted with any inversion, without audio (good for luxcrypt decoder without digital audio).
The modify are:
1 - You connect for one second the pin 18 of DELTA 5.4 with pin 2 of IC MM74HCT574N (between the display module and access module) this removed the black screen. This could reset the decoder, try again.
2 - You connect the pin 22 with pin 23 of DELTA 5.4 now the video is decrypted with any inversion.
If you connect pin 19 with pin 20 of DELTA 5.4 you can inverted the video. Do you know a metod to eliminate the continous inversion?