I’ve been using an APC power backup model Back-UPS 500 for 6 years on my Dell Dimension 4100. I recently upgraded to Dell Studio 9000 XPS and found that although I had purchased a new battery for the UPS, that it didn’t function when the power went off. After much correspondence with APC and with Dell Computers, I found that my old power backup won’t work with the new technology – something about “sine wave” etc. etc. (see attached email). The problem is that the UPS model which is required to function with my new computer costs almost five times the amount of my APC Backup-UPS 500! Anyone out there have suggestions?
![]() |
There are isolated problems with current patches, but they are well-known and documented on this site. |
SIGN IN | Not a member? | REGISTER | PLUS MEMBERSHIP |
-
UPS Backup
Home » Forums » AskWoody support » PC hardware » Questions: How to troubleshoot hardware problems » UPS Backup
- This topic has 7 replies, 8 voices, and was last updated 14 years, 1 month ago.
AuthorTopicWStayloga
AskWoody LoungerApril 22, 2011 at 2:19 pm #476211Viewing 6 reply threadsAuthorReplies-
WSMedico
AskWoody LoungerApril 22, 2011 at 3:35 pm #1276884Unfortunately, new tecknology is not cheap initially, but often comes down after a while. You should also check on the wattage requirements of your new PC. I would suspect they are considerably higher than the old PC, and that this is a part of the added cost. A Google search shows lots of options for shopping and reviews.
-
Tim Sullivan
MemberApril 22, 2011 at 7:22 pm #1276914……….
After much correspondence with APC and with Dell Computers, I found that my old power backup won’t work with the new technology – something about “sine wave” etc. etc. (see attached email). The problem is that the UPS model which is required to function with my new computer costs almost five times the amount of my APC Backup-UPS 500! Anyone out there have suggestions?
[/FONT][/COLOR]Hi Tayloga – There is no email attachment to your post. The email info could be helpful to assist you.
Which UPS model are you being told is required? What is the cost?
Is your current UPS not working because you are using Power Chute? Were you also using the RS-232 serial port features?
-
WSJust Plain Fred
AskWoody LoungerApril 23, 2011 at 8:47 am #1276950I’ve been using an APC power backup model Back-UPS 500 for 6 years on my Dell Dimension 4100. I recently upgraded to Dell Studio 9000 XPS and found that although I had purchased a new battery for the UPS, that it didn’t function when the power went off. After much correspondence with APC and with Dell Computers, I found that my old power backup won’t work with the new technology – something about “sine wave”
tayloga,
Hello… I also use “APC” backup and it was purchased around 2007… It still is working on my Windows 7 64 …32 and Vista OS’s (original battery) If your unit isn’t switching during power outages..i can’t see how it would have anything to do with “sine wave” technology.. I am also using the oldest “parachute” software that came with the unit…and won’t update, as all is working… I suggest that you have a “look see” at the connections to and from your battery and make sure that all is correct…Run a self test with the APC unit.:cheers: Regards FredPS: Try to connect something else to the “UPS” (120 volt type at a few amps) and then “pull the plug” and see if the unit will switch to backup power.
-
WSCLiNT
AskWoody LoungerApril 23, 2011 at 2:48 pm #1276971Six years is a long long time in the tech industry.
If you seriously rely on a UPS devices for power failures then you may very well have to fork out for updated equipment.
…Like a device that will sense when a power failure has occurred and automatically shut the computer down cleanly while on the battery backup.Personally, I stopped using them years ago in favor of a decent surge protector.
Meticulous data backup solutions and a means to restore is potentially a cheaper option. -
WSBanyarola
AskWoody LoungerApril 24, 2011 at 3:07 am #1277066I’m beginning to think like you Clint…
I have plenty of dead APC’s and they only seem to last about as long as their warranty..
The batteries are expensive to replace and replavcing a a APc with a new one is pretty expensive…I don’t think APC makes that good a unit and if I decide to keep using a APC I will switch to another brand..
-
RetiredGeek
AskWoody_MVPApril 24, 2011 at 9:50 am #1277072Hi Guys,
Just thought I’d add my 2 cents worth. If you live in a rural area like me a UPS is essential! The power fluctuates constantly setting off the UPSes alarm {yes I have adjusted the sensitivity settings}. I’ve had a pretty good experience with APC UPSes. I’m currently using 4 of them, a 600 on the TV/VCR {Purchased last month}, a 1500 {Purchased 10/2005} on my desktop setup, a 1250 { Purchased 1/2006} on my secondary desktop XP/UBUNTU dual boot machine, a 350 for my NAS, Cable Modem, Router, and a 750 on my wife’s machine. The last 2 were purchased before 7/2005 as I couldn’t find them in Money and that is how far back the records go. YMMV.:cheers:
-
Paul T
AskWoody MVPApril 25, 2011 at 3:59 am #1277142The UPS you describe appears to have a capacity of about 300 watts and your computer is capable of drawing over 400 watts, plus the monitor and anything else you have connected. In this scenario the UPS will fail to run the computer if the power fails.
If you only connect the PC, no monitor or peripherals, you need a 750VA/450w UPS. If you want to run everything if the power fails, you will need a 1000VA/600w UPS.
cheers, Paul
Viewing 6 reply threads -

Plus Membership
Donations from Plus members keep this site going. You can identify the people who support AskWoody by the Plus badge on their avatars.
AskWoody Plus members not only get access to all of the contents of this site -- including Susan Bradley's frequently updated Patch Watch listing -- they also receive weekly AskWoody Plus Newsletters (formerly Windows Secrets Newsletter) and AskWoody Plus Alerts, emails when there are important breaking developments.
Get Plus!
Welcome to our unique respite from the madness.
It's easy to post questions about Windows 11, Windows 10, Win8.1, Win7, Surface, Office, or browse through our Forums. Post anonymously or register for greater privileges. Keep it civil, please: Decorous Lounge rules strictly enforced. Questions? Contact Customer Support.
Search Newsletters
Search Forums
View the Forum
Search for Topics
Recent Topics
-
X Suspends Encrypted DMs
by
Alex5723
23 minutes ago -
WSJ : My Robot and Me AI generated movie
by
Alex5723
41 minutes ago -
Botnet hacks 9,000+ ASUS routers to add persistent SSH backdoor
by
Alex5723
1 hour, 18 minutes ago -
OpenAI model sabotages shutdown code
by
Cybertooth
1 hour, 55 minutes ago -
Backup and access old e-mails after company e-mail address is terminated
by
M W Leijendekker
1 hour, 19 minutes ago -
Enabling Secureboot
by
ITguy
5 hours, 5 minutes ago -
Windows hosting exposes additional bugs
by
Susan Bradley
9 hours, 50 minutes ago -
No more rounded corners??
by
CWBillow
5 hours, 38 minutes ago -
Android 15 and IPV6
by
Win7and10
10 hours, 55 minutes ago -
KB5058405 might fail to install with recovery error 0xc0000098 in ACPI.sys
by
Susan Bradley
22 hours, 11 minutes ago -
T-Mobile’s T-Life App has a “Screen Recording Tool” Turned on
by
Alex5723
1 day ago -
Windows 11 Insider Preview Build 26100.4202 (24H2) released to Release Preview
by
joep517
19 hours, 27 minutes ago -
Windows Update orchestration platform to update all software
by
Alex5723
1 day, 8 hours ago -
May preview updates
by
Susan Bradley
19 hours, 35 minutes ago -
Microsoft releases KB5061977 Windows 11 24H2, Server 2025 emergency out of band
by
Alex5723
11 hours, 10 minutes ago -
Just got this pop-up page while browsing
by
Alex5723
1 day ago -
KB5058379 / KB 5061768 Failures
by
crown
21 hours, 28 minutes ago -
Windows 10 23H2 Good to Update to ?
by
jkitc
29 minutes ago -
At last – installation of 24H2
by
Botswana12
1 day, 23 hours ago -
MS-DEFCON 4: As good as it gets
by
Susan Bradley
10 hours, 46 minutes ago -
RyTuneX optimize Windows 10/11 tool
by
Alex5723
2 days, 11 hours ago -
Can I just update from Win11 22H2 to 23H2?
by
Dave Easley
10 hours, 21 minutes ago -
Limited account permission error related to Windows Update
by
gtd12345
3 days, 1 hour ago -
Another test post
by
gtd12345
3 days, 1 hour ago -
Connect to someone else computer
by
wadeer
2 days, 19 hours ago -
Limit on User names?
by
CWBillow
2 days, 23 hours ago -
Choose the right apps for traveling
by
Peter Deegan
2 days, 12 hours ago -
BitLocker rears its head
by
Susan Bradley
1 day, 20 hours ago -
Who are you? (2025 edition)
by
Will Fastie
1 day, 19 hours ago -
AskWoody at the computer museum, round two
by
Will Fastie
2 days, 15 hours ago
Recent blog posts
Key Links
Want to Advertise in the free newsletter? How about a gift subscription in honor of a birthday? Send an email to sb@askwoody.com to ask how.
Mastodon profile for DefConPatch
Mastodon profile for AskWoody
Home • About • FAQ • Posts & Privacy • Forums • My Account
Register • Free Newsletter • Plus Membership • Gift Certificates • MS-DEFCON Alerts
Copyright ©2004-2025 by AskWoody Tech LLC. All Rights Reserved.