Sony DA4ES A/V Stereo Receiver Dolby Digital Pro Logic Parts or Repair

Up for sale is a Sony DA4ES stereo receiver. It seems to have some issues but I'm not sure what is wrong with it. When hooked up to speakers there is some static noise. It might just be some connections that need to be resoldered. Specifications: dual 32-bit processors for surround decoding (Dolby Digital EX, DTS-ES, Pro Logic II, DTS 96/24), DTS Neo:6 and Digital Cinema Sound modes 110 watts x 7 into 8 ohms (20-20,000 Hz) at 0.05% THD multibrand LCD remote with macros dual-room/dual-source A/V capability (composite video and stereo preamp output for second room) video conversion (composite to S-video) 7.1-channel preamp output 5.1 and 7.1-channel inputs RS-232C port component video switching: 2 in, 1 out (50MHz bandwidth) digital inputs: 4 optical and 2 coaxial optical digital output 4 audio (including phono) and 5 A/V (including 1 front-panel and 5 S-video) inputs stereo and multichannel analog direct modes digital and video power management Control A1II & S on-screen display (requires TV with direct video input) OP (Optimum Pre-amplification) Processing ensures a high signal-to-noise ratio at all volume levels wide-range frequency response frame-and-beam chassis Sf (S-fin) heat sinks oversized power supply and transformers aluminum front panel two 12V triggers IR repeater: 1 in, 2 out 2 sets of main speaker outputs banana plug-compatible terminals for all speakers 16-7/8"W x 6-15/16"H x 19-11/16"D