• Tablet Unusual PhoenixD pantalla blanca/White screen tablet Unusual PhoenixD

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#1 Tablet Unusual PhoenixD pantalla blanca/White screen tablet Unusual PhoenixD


by Zemog 10 October 2014, 10:54
Hola, tengo ésta tablet con chip Amlogic AML8726 y controlador de carga AXP202. Inicialmente no cargaba y AXP202 se calentaba mucho.
AXP202 ha sido sustituido y la batería carga constantemente con un consumo de 0,39A y led de carga se enciende correctamente.
Tras cargar por varias horas la batería y comprobar voltaje 3,7V en batería, al pulsar power la tablet no responde.

Se ha realizado un corto en NAND (pines 41...44) para intentar resetear y entrar en modo recovery. Ahora, después del corto, la tablet responde al botón power, pero la pantalla se queda completamente blanca, sólo con la luz del backlight.

Cuando la pantalla está apagada, todos los voltajes están presentes en las bobinas (3,3V, 1,2V, 4,6V...) pero si la pantalla está blanca, el voltaje en todas las bobinas cae a 0V, excepto la correspondiente a +Vled y otra con 3,3V.

¿Qué puedo hacer?
..................
Hi, I have this tablet with Amlogic chip and charge controller AML8726 AXP202. Initially AXP202 not loaded and got very hot.
AXP202 has been replaced and the battery constantly charged with 0,39A consumption and charging LED turns on properly.
After charging for several hours the battery and check battery voltage at 3.7V, pressing power the tablet does not respond.

It has made ​​a short NAND (pins 41 ... 44) to try to reset and enter recovery mode. Now, after the short, the tablet responds to the power button, but the screen goes completely white, with only the light from the backlight.

When the screen is off, all voltages are present in the coils (3.3V, 1.2V, 4,6V ...) but if the screen is white, the voltage at all coils falls to 0V, except the corresponding to Vled+ and one with 3.3V.

What I can do?

Re: Tablet Unusual PhoenixD pantalla blanca/White screen tablet Unusual PhoenixD


by Google Adsense [BOT] 10 October 2014, 10:54
This topic is marked as ARCHIVAL. Please only reply if your message contains the solution (Terms and Conditions p. 12.1).

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