Tip & How-To about Onkyo TX-SR804 7.1 Channels Receiver
The Mainboard on the TX SR804 is falty and i just fixed two units with this solution and it bullet prof un der the HDMI board you will find the mainboard stating up right with its back facing the preamp board and it has 3 screws that secure the mainboard to the system 2 on the middle top of the receiver and one on the right side just under the screw you removed for the HDMI board that secures it to the Audio processor board.
Once the screws have been removed pry the board back going from left to right and slowly disconecting the board. THE FIX. once infront of you clean all of the ribom connectors and the and bend the pins on the connector P954A, P959A , P2005A and P2004A THESE CONECTORS ARE THE REASON THE SYSTEM WILL SHUT DOWN SPECIALY THE FIRST TWO. I ALSO RECOMEND PUTING A INTERNAL FAN POINTING TO THIS BOARDS KEED THE HEAT DOWN. the reason the SUB is low or the HDMI does not seem to work well they are related to the SIF connectors on the the are 4 on this board and i used a thin bud hard plastic and inserted bering each sif cable to push the pins againt it. this is a 20 minute job and you amp will be fixed. i fixed many like this. Have a wonderfull holiday. Mvianna
Posted by marrat... on
Jul 07, 2014 | Onkyo TX-SR804 Receiver
Sep 10, 2009 | Onkyo TX-SR804 7.1 Channels Receiver
Aug 26, 2009 | Onkyo TX-SR804 7.1 Channels Receiver
Jul 06, 2009 | Onkyo TX-SR804 7.1 Channels Receiver
Nov 21, 2008 | Onkyo TX-SR804 7.1 Channels Receiver
1,679 people viewed this tip
Usually answered in minutes!