Question about Uniden UBC-3500XLT Handheld Scanner 25MHz-1.3GHz*

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Battery error on screen

Works with mains connected but not without

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You need to replace the battery. they don't last forever. do a search an you can purchase an new battery without having to solder them in yourself.

Posted on Mar 29, 2014

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Posted on Jan 02, 2017

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When you plug a cord into a two pin connector that I assume is on the side of the box, it should disconnect the batteries inside. If taking the batteries out kills the power completely with the cord still attached, then the switch on the power socket in the unit is NOT connecting the built-in power supply.

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In my home using 100AH battery for inverter , want to know wht happens if the baterry is not connected to inverter ? Is battery life decreases..? or WHAT ELSE WILL HAPPENS TO BATTERY ..? plz give an...


It depends upon the type of UPS.

A true UPS requires a battery to be connected to the inverter at all times. Mains power is used to charge the battery constantly and battery is required to continually supply power to the inverter which then converts the voltage to mains supply voltage.

A lower powered and cheaper type UPS areswitch-over types, when the mains supply fails, the UPS switches over to thebatteries and the inverter in milli-seconds which then supplies mains power to thecomputer and peripherals.
This type UPS may operate without a battery, but it depends upon the design of the UPS and the battery error detection system In most cases I doubt it can operate without a battery. You can try the UPS without a battery, make sure the battery terminals do not short against each other.

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I think i shorted out my motherboard with another inverter to powerful now pc isnt coming on compaq 442875-001


Connect a known good inverter and Screen with the laptop's battery removed and power cord disconnected. The motherboard will power up without a screen or inverter connected if it's working. If not check F1 or FS1 on the main board power supply section. Also check the diodes in that area for shorts. Sometimes what happens is the screen or inverter gets plugged in while the battery or power cord is connected. Even thou the laptop is powered off it still has the standby voltage live.

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What do i do when my laptop won't turn on


Is the power light glowing ?
Do u find any error messages in the screen.
Do u find a blue or black screen ?
Remove the battery from behind the laptop and connect directly through main.

If it works, replace ur battery.


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try connecting cam to cpu without battery. if that soesnt work the powersupply to the main board is bad.

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App error 523


Yes, it will work fine again. This happens when you ran an application which did not close or corrupted. There is a way to just delete that program and start up your phone. But very complicated. However if you have a backup or are ok with a new fesh phone without your data, then just reinstall your OS.
Install blackbery desktop to your computer.
Download the latest blackberry software from your carrier's web site and install it to your computer.
Launch Blackbery desktop and connect your phone WITHOUT THE BATTERY with the cable and select App Loader and follow the screen prompts. When this finishes you will get a different error on the screen. Just try the above again with the battery in your phone and your phone will be fine again

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