TE685AVR, Unit is pluged in, have power to surge only outlets,power button will not come on. Unit not used for 5 years, does battery need full charge for the power button to work?
Computers & Internet - Power
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Answers & Comments
The power button will not work if the UPS has a defective/worn out battery or a mechanical problem. It will also not work if you power cycle the unit too rapidly.
This UPS uses a sealed 12V 7.42AH lead acid battery. These will fail over time even when not in use. Since it's been 5 years since you used the UPS, at minimum the battery needs to be replaced. You may need to replace the entire unit. The manual indicates that the appropriate replacement battery is BA-TE685AVR. You need to remove 6 screws to remove the cover to access the battery compartment. Measure the dimensions of the battery. Then, go to a battery specialist shop or Google "TE685AVR replacement battery" to find replacement batteries. The BA-TE685AVR is no longer available. Make sure that the replacement is the same size and has the connections in the same location as the original battery so that it fits in the TE685AVR.
ManualsLib has the manual for the Dynex TE685AVR here: https://www.manualslib.com/manual/41588/Dynex-Te685avr.html . See page 4 for the trouble-shooting section on the power button not working. See page 2-3 for the information on replacing the battery.
I hope this helps.
Cindy Wells
(Note: sometimes the old battery swells as it fails. If you have a problem taking out the BA-TE685AVR, replace the unit. Recycle the old battery properly.)
Power supplies like this usually invert the power from your wall plug into usable current thru its outlets. The surge protection is likely direct without being inverted. The remainder of the plugs , likely to be the source of power during an outage, are likely on the inverter circuit that supplies power thru a battery that is always charging. These batteries do not 'store' well over time and are meant to have occaissional/full time activity. Lengthy storage without use leads to shorting of a cell or two inside the battery and then it would not be able to pass the current needed to run items during a short power outage. If you can not manually recondition the battery..replacement of the battery would be the next step.