Got one of these in the other day. It turned on fine and was able to cycle inputs but had no sound at all. A quick look at the commonly failing inductor L7002 showed it was ok. However there was only 2v present on the feed of the inductor. A quick trace back showed the 5v reg Q6406 had failed. After replacement everything powers up and works fine again.
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Hi everyone!
I turn to you in hope someone could point me in the right direction since I lack knowledge and experience in diagnosis of audio equipment. (My experience is in computer chip level repairs.)
I bought an Onkyo TX-NR609 receiver which initially produced no sound on speakers/headphones, there was no delayed relay click, speaker matrix icon didn't show up, USB/NET stuck in "Now initializing", instead of DSP/1st NET firmware version there were ?????????...
There was flux residue around the D830K013BZKB4 DSP chip (Q3001) on the HDMI... -
so i took out one of my spare gigabyte ep35-ds3r mobos from storage for use to do some cpu, ram and video card testing of stuff i bought from ebay and got for free from momaka. he bought 50 e8400 cpus for cheap from ebay some years ago and i decided to help him relieve him of some of his supply since he had waaaay too many!!
what did we say about hoarding too much stuff and depriving others of them?! *cough* socialism *cough* lol! 
i had to blow some dust off the board and heatsinks with the datavac as i didnt clean it up before putting it in storage. after finishing... -
Good morning everyone,
I'm trying to repair an onkyo ht-r390 that has no sound output, despite the volume being at maximum, the rest seems to work; the video output signal (coming from an hdmi input) is present, but the audio is absent. Similar situation if I send an audio signal from any input I have no output.
The firmware reported is the following:
M:1.00/11107BLP
D:?.??/????????
O:1.00/11107AL
The DSP firmware given the question marks seems corrupt.
On the BCHDM-0678 - 25140678 - QPWBCHDM0678A0 board the chip that usually seems...05-11-2025, 02:59 AM -
Hi guys hope you all doing fine.I have an Onkyo HT-R960 from my uncle that he says he powered it on one day and no sound at all.I took it to try and repair it.I am also using it as an opportunity to start learning how to repair units like these and also amplifiers. When i first brought it home I also realized it wasn't outputting any video and audio tru the HDMI Ports.So followed a youtube video on how to change 5 caps to get HDMI output back.Did exactly that and now i have Picture tru the HDMI Ports.But still no audio. Checked a lot of voltages according to the schematic and also visually nothing...06-14-2023, 12:23 PM -
Hello, I bought this Mac from a friend, he said that it simply stop working. The MacBook looks very clean but does not power on, stuck on 5v 0.42A, and sometimes display 5V and 0A (then 0.071A and again 0A).
I opened it looking for some problem, it was not touched before for sure and the board is very clena, no spot of corrosion at all from what I can see. Voltage on multimeter of the board off the case it's the same, 5V 0.42A. But then I noticed this "clicking sound" come from the board ( I attached here the audio file).
Looking on google I found this:...