I have 2 HL Bulldog tanks. They worked perfect one day then about 3 weeks later went to start them again and none worked they both are on channel 3. I bent the legs on the chips and put them back and one came back to life. The other would do everything but move. The pitch of the speaker changed, but the tank would not move in any direction. Turret moved and fired. Recoil would not work as well. Is there something on the main board I should check? the only thing that happened to these tanks and controllers is they sat in my garage for about 3 weeks.

Thanks everyone, Please help,

Jack