ralphkramden25

IC5 was not the power problem. I will have to actually get a meter out and see what's going on. if there is any more information on this power board I would appreciate it!!

I have replaced 3 power boards on the 3 sound bar's and was successful. Now I have one of the the three subwoofers not powering up. I ordered the IC5 431 Zener and will replace soon. I will keep you posted.

Everything seems good. I did this on 3 units and have 100% working. Bluetooth responds correctly now!

Update on the smaller allen screws that hold the power supply. It is one step down in allen size. The issue is two fold.. 1- Remove loctite before you try to unscrew, just scrap it away. 2- put the panel back in original position for mechanical advantage. I was fighting the panel flex and did not get a bight at all from my allen. Got one out but still working on the other.

Some more- Blue arrow is the current 124V lines Red=+24 and Blk is ground. (pic above says 12 but I meant 24) Green arrow is STB/VDD/GND. Red Arrows...UGH... Screws have locetite on them and I don't have the right allen for the PWR supply on the outside. So once you are inside the box you have regular screw heads. I own alot of allens but I don't have the one for the Power Supply. I need to make my own holes and bracket for my power supply either way so... Likely gonna dremel the bad circuit board out.

It's alive. So here is my archive of the issues... This is the Power supply I have and where you hook up to this one! Make sure you verify yours.

Bar 48 effort here... It seems my order has arrived and I confirmed it is 24V 4A and 5V 1A. Be Careful... the amazon link works but you have to choose the right configuration... Amazon currently out of the 24V 4A and 5V 1A..... https://www.amazon.com/dp/B07WKH5RZV/ref=srdp?keywords=noyito+ac+to+dc+power+supply+24v+5v&srpt=POWER_CONVERTER&sres=B07WKH5RZV%2CB07T9PJ9D7%2CB07BDL176B%2CB07JV7CN1T%2CB07C1JHBB3%2CB07CNTHTSP%2CB07FNFJTHH%2CB0816B34FR%2CB07CML2GXN%2CB081RGVJGD%2CB06XJVYDDW%2CB07BLTTX1W%2CB07C8R5PJD%2CB07HWP4TSX%2CB07G6J3PK1%2CB07BLQKW37&qsid=135-3283479-4546535 So I got it all unscrewed and getting started... Following this- GND is your ground, VDD is your +5V voltage, and STB is your standby line (as labelled from the original power supply removed from the Bar48). Because the STB line also happens to be a +5V channel, you can simply twist the VDD and STB wires together and plug them into the +5V out line of the power supply, and the soundbar should work. Make sure you verify which side of the new power supply is 5V and which side is 24V! Very important to not plug the VDD and STB wires into the +24V output by accident or you will likely fry your Bar48's mainboard. Any other tips before I let the smoke out?? Mounting options? I will likely glue or drill and bolt. Anything to test or check other then it works?? Cheers for all the contributions. I almost tossed this in the bin.

Harold this sounds genius! I can certainly solder this up but... A little confused on the pulling the STB (Standby??) High or low? I assume you pull it high. Interesting choice to fix this although it means an extra power cord for life. Ralph

I was going to do this exact same fix and just haven't had the time. Just wanted you to know I really appreciate you sharing this. After all the usual problems. Won't turn on at all. Won't output sound randomly on some inputs but not all. My current issue is everything works great except Analog in. My first thought was the jack itself but it seems to be a bigger issue. The unit does power on and off oddly, like it misses the power command no matter if I use the remote or the button. I also have gone back and forth between the V83 and V30 release but little changes. Basically I seem to kill it and revive it but keep reviving with a new random issue. This last issue seems pretty repeatable and A power issue would explain some things.