Question about Denon AVR-3805 Receiver
If the display never lights up at all, even for a few seconds, the main power transformer is the most likely problem. I work at a Denon authorized service center and repair lots of these Denon's, including this model.
The transformer should be checked to make sure, but it is more comon than anything else.You can also check the fuses inside the unit. Make sure the unit is not plugged in when you open it. It has several glass fuses, but the one close to where the A/C goes into the board is the one to check first. If the problem is not the transformer or fuse, it could be any number of things in the power supply. If the main fuse is blown it will do the same thing.
If you can determain if it is the power transformer I can give you the part number. I can also tell you how to check the transformer if you have a multimeter. Just let me know how you want to resolve this. It is reccomended that you take it to a service center for repair if you do not have the proper tools to repair it. If it is the transformer, the only tools you need are a number 2 phillips screwdriver and multimeter or ohm meter. The repair cost is around $200 to $250 for the transformer depending on the mark up of the part and the labor rates of the service center.
Some service centers give free estimate's or charge a small fee for an estimate. This might be a good alternative to find out if it is the transformer if you cannot check it yourself. Just don't tell them you are fixing it yourself and just want to know what to replace. I have seen some places sabotage equipment to teach people a lesson for trying to do it themselves. I have never done that, but I have seen it before.
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Let me know if you need more help,
Posted on Jun 28, 2008
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Posted on Jan 02, 2017
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