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Old 02-13-2010, 12:30 PM   #64
Kralik
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Posts: 609
Karma: 1013897
Join Date: Jul 2009
Device: Rooted NST
Quote:
Originally Posted by bberry View Post
The JB fw is 0.33h (modified by tselling). I installed it on Dec 17 and reported it in this thread.

When I turn the reader on the led in the right top corner flashes exactly 2 times, the JB logo is shown on the screen. I was not able to reach the self-test menu nor firmware upgrade screen. The logo stays forever or till I press hw reset, whichever comes first :-)
I seem to remember that somebody else had this problem and they were able to fix it by running a firmware upgrade. Here's their description, for the JBL:

Quote:
Originally Posted by TheBard View Post
My JBL froze last night, but I may have found a possible solution.

...

3. Removed SD card, inserted SD card with firmware, repeated firmware load sequence (step 2, above). LED went ON, and blinked intermittently. After a fairly short time (minute or two), JBL rebooted and showed the normal three choices! Success!

4. Replaced firmware SD card with card containing books, replaced Alkalines with freshly-charged rechargeable. Turned JBL ON. "Books" graphic eventually appeared, and after a while, the normal three choice screen appeared. Success again! My bookmarks were preserved as well!

...

Conclusion:
The "reinstall firmware fix" worked, at least in this case. In some cases it might take a fairly long time to reinstall the firmware, and the Jetbook first page may be the only thing on the screen. You might take note of LED activity. If it blinks occasionally, the SD card with firmware IS being read.
I noticed sometimes with the Chinese firmware that the screen can get stuck on the logo but the system itself was actually running! Maybe:

1) Download 0.33g firmware from ECTACO (33h is the patched firmware, but ECTACO acknowledged that it is buggy)

2) Install on an SD Card and run the firmware upgrade procedure. Hold Power and Right-Arrow for about a 2-3 minutes when you boot.

3) After waiting a couple minutes, press the OK key a couple times. If you start to see the LED flashing, it means it is doing the upgrade! Give it perhaps 30 minutes just to be safe before resetting.

YMMV of course, but this is just a suggestion. Also, another user (LuBiB I think) had a "bricked" jetBook after messing with firmware... but it eventually reset itself after about a month when the internal battery finally died.
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