teresa, there is an error log that can be run (if you're quick) and a reset procedure.
* error detection count - (from OFF/STANDBY state) press & hold [PRESET <–] &[ STANDBY/ON] buttons. Release when the unit powers on. each press of [ENTER] key display a protection error count. DC errors / OVERload error / TEMPerature errors
* error reset- (from OFF/STANDBY state) press & hold the [ALC/STANDARD SURR] & [STANDBY/ON] buttons. Release when the unit powers on. The unit will display "CLEAR?" press [ENTER] to reset error and error logs. The unit will respond with "OK".
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See what you find.
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the other thing you can do, is to go to this [http://www.ifixit.com/Device/Pioneer_VSX-821-K|device page], scorll down to Service Documents, and download the service manual by clicking on the blue link. you will need both parts for a complete manual. Hope this helps, good luck.
teresa, there is an error log that can be run (if you're quick) and a reset procedure.
* error detection count - (from OFF/STANDBY state) press & hold [PRESET <–] &[ STANDBY/ON] buttons. Release when the unit powers on. each press of [ENTER] key display a protection error count. DC errors / OVERload error / TEMPerature errors
* error reset- (from OFF/STANDBY state) press & hold the [ALC/STANDARD SURR] & [STANDBY/ON] buttons. Release when the unit powers on. The unit will display "CLEAR?" press [ENTER] to reset error and error logs. The unit will respond with "OK".
See what you find.