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Technics SU-G70 clicks but doesn't display or sound

I turn on the amp (Technics SU-G70) and it clicks as though the power is turned on (and later you're able to return to feel that the amp is warm). However, the display is blank and there is no sound output. In the past, I could just slap the side and it would come on. After hitting it, the amp would either go back to blank after a few moments or it would stay on. It was hit-or-miss, no pun intended. Now, it seems no amount or strength of hitting will get it to come on. Please help. I have my first HDTV coming in a couple of days and I want to have at least something to hook-up. :-) Thanks.

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I just got mine back from repair shop, same symtoms, they replaced power supply, in your case it was hit and miss for a while, so maybe bad power supply connections inside.

Posted on Jan 18, 2008

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Greetings
Mostly this happens when power output is damaged
or the power supply circuit has a problem
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I have a Technics SU-G70 Amplifier with a problem. Overall, it works fine except for a speaker issue. When turned on, the Left speaker output on the monitor is lit up from 0 to 120. Just below, the...


Sir the problem of your unit is the power IC the other channel of this IC is already faulty. unplug the unit to the main AC outlet then remove the cover of your unit you will see a large aluminum plate the power IC is attach to that heat sink in order to fix this you should replace the IC. Or can you give me the part number of the IC so I can determine the pin configuration. Good day and best regards.

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it doesn't sound like it. but maybe. it would be the input section of your amp that blew if it did go. try replacing your speaker wire first, if that doesn't work then your volume knob(if the volume is analogue) may need to be replaced. if that doesn't work. then you may have blown the amp. what source are you testing with?(cdplayer, dvd player, etc.) and what inputs are you using? (analogue, digital optical, digital coax)

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