My UPS 850 charging battery normally but if I press the power switch it work for only one second then turns off and not found any volt on output voltage port . What can I do in this situation ?
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Re: Problem with UPS 850
How old are the batteries and have you checked the voltage? Many (most) UPSs have very "dumb" charging circuits (often only a constant float voltage with no regulation) that will try to charge a completely flat battery (I've seen many keep trying to charge a dead battery even after it had overheated to the point the case split open). Aside from that check for bad caps, if there is a fan make sure it is working (many consumer-grade UPSs uses cheap sleeve bearing fans with a high failure rate), and if you rule those out check any transistors to and relays see if they are good. -
Re: Problem with UPS 850
I changed the battery and charged. All components work normally, but if you press the power switch, UPS works for only one second and then turns offComment
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Re: Problem with UPS 850
How did you charge the battery? What is the Voltage at the battery terminals with and without the USP plugged into the AC oulet?Never stop learning
Basic LCD TV and Monitor troubleshooting guides.
http://www.badcaps.net/forum/showthr...956#post305956
Voltage Regulator (LDO) testing:
http://www.badcaps.net/forum/showthr...999#post300999
Inverter testing using old CFL:
http://www.badcaps.net/forum/showthr...er+testing+cfl
Tear down pictures : Hit the ">" Show Albums and stories" on the left side
http://s807.photobucket.com/user/budm/library/
TV Factory reset codes listing:
http://www.badcaps.net/forum/showthread.php?t=24809Comment
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Re: Problem with UPS 850
Hi. The new battery is realy new?
Check voltage of the battery with load. example a light incandecent.
If the battery voltage drops considerably with the bulb connected, it is damaged. (Nominal 12vdc, with the bulb, goes down to 7vdc) the battery is damaged.
Check the status of the switching relays, check the contacts and check their coils.
It also checks the transformer transistors or mosfets.
Perhaps this one is open and is not doing the work of generating the output voltage to the transformer.Comment
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Hi,
I have a iphone XS that came in for a screen replacement, the screen was badly cracked, and inside missing scues, on the back of the screen still the blue protector, the screen was a LCD. So we replaced the screen and all good, installed the screen and we noticed that pressing the screen with a bit of force but not excessive, the phone dies. After plugging the charger it turns back on, but again if you press it it dies. I open the phone again, and I can't see anything major, with the phone open, if I press on the logic board, battery, charging board, or even putting pressure on... -
I have a post on psx-place for this but thought I'd try here as well in case anyone has experience or the schematics or any kind of help. Here's the original post from psx-place:
START
Hi, so I bought a YLOD Fat PS3 as I wanted a repair project and thought it would be a good way to get experience. I was able to solder to the RX, TX and Diag pads on the COK-002 motherboard and was able to get external access and retrieved the codes. I haven't powered it on beforehand so these should be the last ones. I did try to get internal access immediately after but kept getting scopen response... -
Hello everybody! Posting this in hopes somebody has some expertise that leads to a clear path of troubleshooting that saves me a lot of time!
My macbook has the flex cable problem, the one that prevents the screen turning on. Ive been dealing with this for the last 3 years. Last year it went dead and I managed to fix it following youtube tutorials. But my fix wasnt the best, the problem returned a month later. This week, it went dead again. I again tried to fix it.
This time the original cable broke too close to the screen, it can't be fixed without tearing the screen... -
I have an LG Plasma TV 60PM6700 for the past ~12 years.
In the last ~3-4 months I have been having some issues.- Problem: It started with random picture disappearing (sound still worked).
Frequency: Happened about once a week.
Solution: Had to turn off TV wait a few seconds before turning it on again. - Problem: Then it got worse and the TV started to shut down and when turning on the no picture just sound.
Frequency: Happened about once a week.
Solution: Had to turn off TV wait about 10-20 seconds and turn it on again to solve. - Problem: TV shuts down
- Problem: It started with random picture disappearing (sound still worked).
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Good evening, gentlemen.
I have a problem with my monitor. It turns off after a few seconds or flickers. Shining a flashlight on the screen doesn't show any image, so I guess it's not the "2 seconds to dark" I read in the forum.
To turn it back on, I have to press the power button twice. Then after a few seconds it turns off again or flickers. See video.
https://drive.google.com/file/d/1L6S...ew?usp=sharing
Things I tried
- Bought a new AC adapter thinking that was the problem but the problem...
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