Now, we are looking at the battery connections. The tray is heavy make sure that you support it from underneath. Disconnect the battery connect and pull the tray out. We are going to take them out really easily. There are 4 screws here to hold this tray in. What we are going to do next is check the intro and battery connections. You plugged the connector in, but it is still not working. Press the on button and everything is good. When you hear the unit come on, that’s a good sign. If and when you plug this in you might hear a spark so we can tell that it’s in. You can see that it fits into a mating plug. This is your main battery connection and obviously for us, it’s hooked. We are going to simply remove the bezel and here you’ll see your battery connection right here. The unit won’t start without batteries hooked up to it. With the cold start not working, that tells us that there is something on the DC side or the battery side that is not connected. I didn’t hear one, so the unit will not cold start. I’m going to press and hold the on button, listen for the beep. If you hear a beep, release the on button during the beep.

A cold start is when you press and hold the button and wait to hear a beep. We are first going to try what is called a cold start. Here we have our little Smart UPS 1500 Rackmount 2U and we have plugged it in and pressed the button, but nothing happened. So today we are going to focus on a Smart UPS Rackmount, obviously by APC. Today we are going to talk about what you do when you get a unit back and it’s not turning on at all. I'm guessing the next step is I have to take the batteries out, but I've just been avoiding it-mostly because I have been doing a lot of photography lately and wanted to make sure the server backups run (such as they are).Hi, it’s John Sevel from CoastTec.

The unit is one I bought off eBay used, and put new batteries into it. It either has to be an alarm, or a piece of equipment inside the unit is making the noise. I shut everything down, turned off and unplugged the UPS and it still makes the noise (because of the batteries I assume). The UPS self-tests OK when using the front panel button, and has no lights on it indicating battery, etc. When I ask for status, I don't see anything out of range. I'm running NUT on a rPi, and everything seems normal. I thought I had some logs on screen or dmesg on my server that was saying something about full storage or unable to contact the UPS, but I restarted everything. A few days ago my APC Smart-UPS 1500 starting emitting a fairly annoying, high-pitched screech.

Apc smart ups 1500 troubleshooting