Passenger rear window inop in window closed position, others OK. No sound...nothing when switch is activated.

Checked switches, power arriving at both. Removed door cover and clear plastic carefully and with few problems.

No broken plastic or parts visible. Removed 3 bolts on "motor" section and bolt on lower arm to right of "motor." Also removed bolt at top of metal arm that window slides down on. Regulator is still stuck in place and I cannot get it out to examine it. Help!

Thanks!