Hi folks ,

Thanks everyone who has contributed in this topic.

Now here is my odyssey with Gigaworks S750.

I have used my set since 2009 up until July 2015 when it refused to power on again .

As I was out of warranty since like 2011 I went and bought Logitech Z-906 (which BTW work very good so far)

This year I updated my HTPC to sport UHD res , and then came the idea to try and resurrect the S750 (also by chance I actually saw that the green LED that indicates power is flashing , but the set does not power on) and I decided to take them to the repair shop located in my apartment building - it so happens that what could best be translated as the building superintendant happens to own that said shop and they are good at this - been here for over 20 years by now .

They repaired the PSU in less than 2 hours .Set was working just fine since then ( 14th this month ) up until about a week ago I noticed that the Rear Left channel goes offline randomly - I tested with a different system with an older X-Fi Sound Blaster - the old Xtreme Music PCI with 2 MBs of ram - barely managed to reproduce the 3:4 cable that I had lost and the Rear Left worked ( well for few simple speaker tests) and I decided that it is indeed the speaker set.

Then I hooked up the set to the HTPC(Using X-fi Titanium PCI-x card) and Rear Left worked for about 1-2 hours and stopped again - tried moving jacks from the 4:4 cable around - turns out the output is coming from the SB .

Dropped them earlier today downstairs and asked the guy to hook up a 12V output for a fan ( have a vague memory that people used this as a solution to the heat output and it worked) and advised on this issue.

After 4 hours they called me to pick the set up - they have hooked a walkman for 40+ minutes to rear channel output and it worked - so I picked up the set and went on to test - not surprisingly the Rear Left channel went poof shortly after .

So I found this topic on the web .

Now I have 2 major issues that are plaguing the set :

The proverbial insta power of upon clicking the switch ( which is not that pronounced now , but is still there)
And channels randomly going off - for a brief period Front Left & Rear Right have been gone , could not replicate it , but still the Rear Left issue is there

I suppose the 25V to 63V change should address the Insta-power-off issue , and cleaning of the annoying glue should resolve the channel going randomly off issue .

By the way , I am somewhat skilled in the area of fixing electronics( at one point in time back in 2011 I actually operated a BGA station for repairing PS3s , and old laptop/desktop MainBoards & VGA cards) but as imagined, my skills are somewhat rusty.

What I consider proper course of action is to change the C®apacitors to proper quality ones , and cleaning of the glue .

If it will help in giving advise to me , I will provide screenshots of the components

This post has been edited by VolF3r: Dec 1 2016, 12:07 AM