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Flash Always ON

OP Chura

23rd March 2014, 12:56 AM   |  #1  
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Hi,

I've received Desire X from friend who couldn't start it.
I've revived the battery (before buying new battery if thats the problem) using 9V battery.
now its alive, however the second I plug it in the flashlight automatically starts.
I've tried with other HTC battery that fits and same voltage and still flash turns on, even without powering the phone.

Any Idea ?
23rd March 2014, 02:25 AM   |  #2  
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Seriously, you used 9V battery on device which use 3,8V ?
Are you mad!?
23rd March 2014, 07:09 AM   |  #3  
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Quote:
Originally Posted by Klapo

Seriously, you used 9V battery on device which use 3,8V ?
Are you mad!?

Mad? No.
However I am electronics engineer.
And the battery now works, I'm sure it's not for long.
To the point, what may cause the flash to be always on?
23rd March 2014, 06:40 PM   |  #4  
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Quote:
Originally Posted by Chura

Mad? No.
However I am electronics engineer.
And the battery now works, I'm sure it's not for long.
To the point, what may cause the flash to be always on?

Because you dont use the right battery
23rd March 2014, 09:18 PM   |  #5  
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Oh sorry but that make me laugh so hard...You say u are engineer but...Agreed with @GtrCraft.Wrong battery can do some strange problems.
23rd March 2014, 11:45 PM   |  #6  
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I sort of agree with OP. You probably shouldn't have recharged the battery with a 9V, another HTC device should be enough. You might have shorted something inside the phone, so now it's ****ed up.

Sent either from my potato phone, or my Nexus 7.
27th March 2014, 10:40 PM   |  #7  
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Quote:
Originally Posted by Stereo8

I sort of agree with OP. You probably shouldn't have recharged the battery with a 9V, another HTC device should be enough. You might have shorted something inside the phone, so now it's ****ed up.

Sent either from my potato phone, or my Nexus 7.

The battery labeled 3.7v, while the 9v revive got the battery to 3.32v only.
I don't agree with possible damage to the phone since lower voltage can't do that.
However it is possible that due to lower input level it cause the phone to mis-behave on this specific battery.

Thanks, I'll try to find new one.
28th March 2014, 08:09 PM   |  #8  
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Here is a story about overvoltage a battery.
You can try to revive a dead battery by overvoltage it and you can obtain some result for some short time. I tried this many times with batteries/accumulators of different voltages but you must understand this:
1. NEVER apply this with battery in circuit or mounted on device, battery must be unconnected,
2. This method is the begining of the end of batt/acc, after one or two revivals you can throw it away,
3. You can try this ONLY if you must test a device with a DEFECTIVE or old battery. After a short impuls of overvoltage sometimes the battery can deliver enough power to test some things.
1st April 2014, 07:51 PM   |  #9  
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I understand, and exactly what I did.
I've verified the phone starts and now I've ordered new battery.

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