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==Service=====Service==Cooling fan: The cooling fan is connected to the AVR board. There is a thermister on the back panel inside. It can be removed so that the fans run continuous. This will burn up the OEM fans if ran continuous. Computer fans can run continuous. If the fan stops you will loose the AVR unit, very hard to find and now you have a door stop. The OEM fans are still around, but getting somewhat rare. It is better to replace them with computer fans, which are a lot less of a problem. ===cooling fans=== There are two of them. One for the voltage control and one on the finals. Both are in back of the unit but only one is visible without removal of case.Cooling fan: The cooling fan is connected to the AVR board. There is a thermister on the back panel inside. It can be removed so that the fans run continuous. This will burn up the OEM fans if ran continuous. Computer fans can run continuous. If the fan stops you will loose the AVR unit, very hard to find and now you have a door stop. The OEM fans are still around, but getting somewhat rare. It is better to replace them with computer fans, which are a lot less of a problem.===LCD Sun Display===If the LCD sub display starts to show garbage you can attempt a reset. The reset is a momentary button inside the unit, you will have to remove the case. So take off the top case and look at the board with a battery on it directly behind the LCD. Right of the battery and in the bottom corner of the board is the black reset button. Use a nonconductive tool to press it and reset the sub display.