I unplugged the PC and I replaced the battery but I have not solved the problem.

Then I opened it to see if there are components that are burned or leak but nothing.

To be sure I replaced the cooling fan but nothing has changed.

Can anyone give me some tips?

Thank you very much.

⟐ Commented July 26, 2025 at 8:04 MST

So it runs only from batteries. Not from the wall.

Thinking the circuit breaker may be burned or just malfunctioning, is this something I can just replace? I tried to search using common keywords with and without the brand with no luck.

Any tips will be welcome.

Thanks!

NOTE: All these tests performed WITHOUT any device plugged to the UPS!

And finally I'm attaching these hi res pics of MY OWN UPS main board just in case you spot anything I may be missing. To me everything looks OK and in good shape, AFAIK this ups was fully working before getting stored and the only issue was dead batteries but.... You tell me??

Well let's see, first things first, ive read over the Net that these prongs do pop-up a lot but I don't have any reference so I don't know if the below is a standard or an activated circuit breaker....

Wdy think?

Next thing I've done is check continuity in these 2 poles, and the multimeter beeped, so I guess it's OK and working, in the locked position "as it is" now?

Then I've checked for 220V (I'm in EU) on the upper right corner connectors and they do read 220V so I'm assuming the fuse is working and protecting the circuit so far (aka not "fused").

Am I right till here?

So, considering the AC reaches the main board past the circuit breaker, I'm at a loss now since I'm not an electronics pro to read the service circuits mapping...

Googling a bit further i found this article:

https://vasvir.wordpress.com/2021/02/15/...

Which for the Rs1000 mentions the change of 3 capacitors.

So my next question is:

Is there a safe way to test if these capacitors are in working order and if there is (multimeter?) how do I perform the check?

Excuse my ignorance once more!

(apparently this is the image of the Rs1000 main board if you feel you need to point me anything out :))

I'll thank any further input on troubleshooting this. Thanks!

Some more tests, each one gets me more confused!

WITHOUT the unit plugged to the wall, setting the multimeter to CONTINUITY, instead of BEEPs from the Multimeter, I get these values on its screen:

The one in the middle produces NO reading and NO beep on the multimeter :?

Then setting the multimeter to DC, I get the following:

THEN, PLUGIN the unit on the wall and turning on the UPS, I get this:

https://www.dropbox.com/s/fjnlawpi12hcqz...

Any insights?

So is it normal that plugged on the wall, with the unit turned OFF I'm getting voltage in the battery connectors? And if so, it means batteries do charge. And if so, what else is not acting so the AC does not kick in while there's wall power??

⟐ Edited March 16, 2023 at 15:03 MST

⟐ Commented September 23, 2025 at 9:36 MST

⟐ Answer edited November 11, 2023 at 13:36 MST

⟐ Answered September 18, 2021 at 12:30 MST

⟐ Answered November 14, 2018 at 15:05 MST

⟐ Answered August 30, 2024 at 9:29 MST