VCR problem

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I have a Toshiba VCR model W614R; it’s about 7 years old. I wanted to give it a good cleaning. So I took it apart (removed the drive assembly and circuit board) to give it a good cleaning and grease some parts (the VCR did work before this). After I finished, I put the circuit board and drive assembly back together (I made sure I aligned the timing gear with the circuit board).

When I plugged it in, everything powered up okay, but, when I tried to play a tape, the VCR only displayed jumping white lines and noise out of the audio. It also didn’t want to eject the tape, only after I unplug it and plugged it back in did it finally did. When I check the tape on another VCR, the video was corrupted (like the VCR erased part of the tape).

I rechecked the drive assembly and the circuit board, I also checked the timing gear as well. I can’t find why it’s not working now…