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Old 6th April 2013, 02:16 PM   #1
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Default Amplifier Does Not power up

I have a Sony STR DH-500 Receiver, it is +/- 4 to 5 years old. I have a problem with the power button. When I switch it on it does not power up, unless I firstly unplug the power cable from the multi plug adapter then re-plug it back. Then only does the receiver power up.

Also another issue which started a few months ago is that a few buttons on the remote control seem to be unresponsive (which I have tested).

Please help me out guys, I do not want to purchase another receiver, if this can be resolved myself then I would greatly appreciate that.
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Old 6th April 2013, 04:23 PM   #2
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if you power it up with the cable trick, does it work normally ?
can you turn it off with the power button or does it stay on ?

remote controls are often clogged by dirt which gets trapped between button made of conductive rubber and circuit board; the only way I know to fix that is to open the case - usually two shells snapped together - and clean button rubber and contact metal with piece of cloth and a drop of alcohol ...
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Old 7th April 2013, 12:54 PM   #3
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Hi payloadde, please forgive me but I am assuming that cable trick is the power button on the receiver? I haven't actually opened up the receiver itself. When I do power up the receiver via the power button on the receiver itself, it does power up and when I turn it off then same way, it does go off. But if I have to power it up again right afterwards or even later in the day it does not power up at all. I have to go through the entire routine of unplugging the power cable from the socket - replugging it back in - then only will it power up. It is a frustrating because the power sockets are tucked away in the back and very hard to reach.

As for the remote, I did open it up a few weeks ago and I did wipe clean the circuit board and conductive rubber contacts with a cloth and metholate spirit. Thought that would work but the few buttons still do not work as previously.

Any other suggestions please.
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Old 13th April 2013, 01:22 PM   #4
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Quote:
Originally Posted by payloadde View Post
if you power it up with the cable trick, does it work normally ?
can you turn it off with the power button or does it stay on ?

remote controls are often clogged by dirt which gets trapped between button made of conductive rubber and circuit board; the only way I know to fix that is to open the case - usually two shells snapped together - and clean button rubber and contact metal with piece of cloth and a drop of alcohol ...
Hi payloadde, please forgive me but I am assuming that cable trick is the power button on the receiver? I haven't actually opened up the receiver itself. When I do power up the receiver via the power button on the receiver itself, it does power up and when I turn it off then same way, it does go off. But if I have to power it up again right afterwards or even later in the day it does not power up at all. I have to go through the entire routine of unplugging the power cable from the socket - replugging it back in - then only will it power up. It is a frustrating because the power sockets are tucked away in the back and very hard to reach.

As for the remote, I did open it up a few weeks ago and I did wipe clean the circuit board and conductive rubber contacts with a cloth and metholate spirit. Thought that would work but the few buttons still do not work as previously.

Any other suggestions please.
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