Was having this problem and couldn't find a solution online. Just took everything apart, examined the internal components and realized that the gears connected to the motor were jammed. Gently pried at them with a flathead screwdriver and ended up freeing them up. Inserted the batteries to give it a test and boom, she works like new! Added some additional lubricant to the gears to prevent another jam from happened and sealed her back up. If you are having the issue of the 4 blinking lights on the viewfinder and you are unable to take a photo even after changing the batteries and film cartridge, I highly suggest you try this. Odds are its a jam in the gears.