dy/dx
30th August 2008, 03:42 PM
Hi,
I've got a very strange problem: After replacing the display of my Alpine the 2nd time, the display is just light and yellow when the battery is full.
As the battery level gets lower and lower, the problem disappears.
When the battery is 100% full, there is no way to get a screen (except reset). Everything is just white!
The more lower the battery, the more and quicker are the ways to get a screen: When I call the phone, the phenomen disappers or when I switch on wireless lan or bluetooth.
When battery is ca. at 60% level the display works normal. The phenomen is gone.
My obersvation is:
- The lower the battery, the more is the display working
- The more "power consuming" things (incoming call, activating camera, pressing buttons, wireless LAN, ...) I do, the faster I can get a working display.
First, I hope you can understand my observation and my description.
First question: What could this be in your opinion? It is no software problem as the problem persists over hardresets.
My assumption is: Maybe there's a voltage regulator or a capaciator broken. Or something similar. This means that the voltage level is maybe just a little bit higher than normal, say a few mV. For all other components this does not matter. Except the display.
Can this be true?
At the moment, I can work normally with the PDA iff I just load the battery up to 60%. But as you might guess this is no persistent solution.
In my opinion, I could do two things:
1.) Build something that draws exceptional high power for just a very small time and activate this thing when powering on the device. This would not solve the problem but make the PDA useable again. But: How could I do this?
2.) Better way: Repair. Does anybody have some insight of the hardware? Is there a regulator or something that would explain this phenomen? Where is it and how to replace/repair (Soldering SMD would be no problem).
Thank you very much in advance,
Niki
I've got a very strange problem: After replacing the display of my Alpine the 2nd time, the display is just light and yellow when the battery is full.
As the battery level gets lower and lower, the problem disappears.
When the battery is 100% full, there is no way to get a screen (except reset). Everything is just white!
The more lower the battery, the more and quicker are the ways to get a screen: When I call the phone, the phenomen disappers or when I switch on wireless lan or bluetooth.
When battery is ca. at 60% level the display works normal. The phenomen is gone.
My obersvation is:
- The lower the battery, the more is the display working
- The more "power consuming" things (incoming call, activating camera, pressing buttons, wireless LAN, ...) I do, the faster I can get a working display.
First, I hope you can understand my observation and my description.
First question: What could this be in your opinion? It is no software problem as the problem persists over hardresets.
My assumption is: Maybe there's a voltage regulator or a capaciator broken. Or something similar. This means that the voltage level is maybe just a little bit higher than normal, say a few mV. For all other components this does not matter. Except the display.
Can this be true?
At the moment, I can work normally with the PDA iff I just load the battery up to 60%. But as you might guess this is no persistent solution.
In my opinion, I could do two things:
1.) Build something that draws exceptional high power for just a very small time and activate this thing when powering on the device. This would not solve the problem but make the PDA useable again. But: How could I do this?
2.) Better way: Repair. Does anybody have some insight of the hardware? Is there a regulator or something that would explain this phenomen? Where is it and how to replace/repair (Soldering SMD would be no problem).
Thank you very much in advance,
Niki