Demeter Amplification | TGA-2.1 User Guide8Troubleshooting:• No Sound : TURN UNIT OFF IMMEDIATELY. Ensure that speaker is connected to rear speaker output, andthe speaker cable is not shorted out. Make sure speaker impedance is correctly matched to the output. Check allother cables & connections, if light is off, check the fuse. If still no sound, try replacing your preamp tubes, oneat a time. If a power amp tube fails, send the unit in for repair, as the unit needs to be re-biased.• Scratchy/Microphonic Sound : Try replacing the tube closest to the input jack (12Ax7)Support:Feel free to call or email us for additional support or product repairs. We are available M-F 11am-4pm PacificStandard Time.Phone : (805) 461-4100Email : support@demeteramps.comWebsite : www.demeteramps.comCopyright:© 2012 Demeter Amplification. All rights reserved.This manual and any associated products or designs are subject to copyright protection. No part of this documentmay be reproduced, in any form, without prior written permission of Demeter Amplification.