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Screensize: 640 x 480 800 x 600 1024 x 768 1280 x 1024 UserName: Password: Format Mode: Basic  Help  Prompt  Format: Font Andale Mono Arial Arial Black Book Antiqua Century Gothic Comic Sans MS Courier New Georgia Impact Lucida Console Script MT Bold Stencil Tahoma Times New Roman Trebuchet MS Verdana   Size 1 2 3 4 5 6   Color Black Red Yellow Pink Green Orange Purple Blue Beige Brown Teal Navy Maroon LimeGreen Message: * HTML is OFF * Forum Code is ON Smilies [quote][i]Originally posted by cirvin[/i] [br]I have an old Radoshack STA-720 reciver that has a bad power amp on the left channel. The sound from it makes me think that the power transistor is unbiased. What should I look for when I try and repair this? Is it more likely that the transistors are damaged or possibly the capacitors are bad? http://i3.photobucket.com/albums/y97/cirvin/amp.jpg ^pic of the amp board, if it helps... http://daxter12.topcities.com <Updated:July [/quote]    Insert an Image File (GIF, JPG, JPEG, BMP, ZIP, PNG) Check here to include your profile signature.