Actualizada !!!!
.... Me ha costado pero lo he conseguido.
A todos aquellos que os de problemas la actualización os recomiendo leer el log. Desde el terminal emulator:
$su
#cat /cache/recovery/last_log
Os aparecerá algo como esto:
Código:
su
shell@android:/ # cat /cache/recovery/last_log
cat /cache/recovery/last_log
Starting recovery on Sat Sep 29 00:07:01 2012
can't open /dev/tty0: No such file or directory
framebuffer: fd 3 (1280 x 800)
recovery filesystem table
=========================
0 /tmp ramdisk (null) (null) 0
1 /system ext4 /dev/block/mmcblk0p1 (null) 0
2 /cache ext4 /dev/block/mmcblk0p2 (null) 0
3 /misc emmc /dev/block/mmcblk0p3 (null) 0
4 /boot emmc boot (null) 0
5 /recovery emmc recovery (null) 0
6 /staging ext3 /dev/block/mmcblk0p4 (null) 0
7 /btmac vfat /dev/block/mmcblk0p5 (null) 0
8 /data ext4 /dev/block/mmcblk0p8 (null) -32768
9 /sdcard vfat /dev/block/mmcblk1p1 /dev/block/mmcblk1 0
Command: "/sbin/recovery"
ro.secure=1
ro.allow.mock.location=0
ro.debuggable=0
persist.sys.usb.config=mtp,adb
ro.build.id=IML74K
ro.build.display.id=IML74K.US_epad-9.4.2.28-20120525
ro.build.version.incremental=US_epad-9.4.2.28-20120525
ro.build.version.sdk=15
ro.build.version.codename=REL
ro.build.version.release=4.0.3
ro.build.date=Fri May 25 14:56:03 CST 2012
ro.build.date.utc=1337928963
ro.build.type=user
ro.build.user=
ro.build.host=Venus
ro.build.tags=release-keys
ro.product.model=EPAD
ro.product.brand=asus
ro.product.name=US_epad
ro.product.device=EeePad
ro.product.board=EeePad
ro.product.cpu.abi=armeabi-v7a
ro.product.cpu.abi2=armeabi
ro.product.manufacturer=asus
ro.product.locale.language=en
ro.product.locale.region=US
ro.wifi.channels=
ro.board.platform=tegra
ro.build.product=EeePad
ro.build.description=US_epad-user 4.0.3 IML74K US_epad-9.4.2.28-20120525 release
-keys
ro.build.fingerprint=asus/US_epad/EeePad:4.0.3/IML74K/US_epad-9.4.2.28-20120525:
user/release-keys
ro.build.characteristics=tablet
ro.opengles.version=131072
wifi.interface=wlan0
rild.libpath=/system/lib/libril-icera.so
rild.libargs=-e wwan0
persist.tegra.nvmmlite=1
debug.nfc.fw_download=false
debug.nfc.se=false
ro.config.notification_sound=NewMessage.ogg
persist.sys.ringermode=2
ro.config.bootsound=PowerOn.ogg
ro.config.alarm_alert=Alarm_Classic.ogg
dalvik.vm.heapstartsize=5m
dalvik.vm.heapgrowthlimit=48m
dalvik.vm.heapsize=256m
wifi.version.driver=V6.1.24
gps.version.driver=V6.9.20
keyguard.no_require_sim=true
ro.kernel.qemu=
bt.version.driver=V9.29
drm.service.enabled=1
windowsmgr.max_events_per_sec=200
ro.setupwizard.mode=OPTIONAL
ro.com.google.gmsversion=4.0_r1
gsm.bodysargsm=32,26,29,29
ro.com.google.clientidbase=android-asus
ro.wifi.country=US
dalvik.vm.dexopt-flags=m=y
net.bt.name=Android
net.change=net.bt.name
dalvik.vm.stack-trace-file=/data/anr/traces.txt
ro.factorytest=0
ro.serialno=C2OKAS005001
ro.bootmode=unknown
ro.baseband=unknown
ro.carrier=wifi-only
ro.bootloader=unknown
ro.hardware=cardhu
ro.revision=0
ro.crypto.fs_type=ext4
ro.crypto.fs_real_blkdev=/dev/block/mmcblk0p8
ro.crypto.fs_mnt_point=/data
ro.crypto.fs_flags=0x00000006
ro.crypto.state=unencrypted
ro.epad.model=TF201
persist.sys.NV_STEREOCTRL=0
persist.tegra.NV_FPSLIMIT=0
persist.sys.NV_FPSLIMIT=35
persist.sys.NV_POWERMODE=1
persist.sys.profiler_ms=0
persist.sys.time_synced=1
persist.sys.NV_STEREOSEP=20
persist.sys.NV_STEREOSEPCHG=0
persist.sys.NV_PROFVER=12
persist.sys.fw.camera.status=1
persist.sys.language=en
persist.sys.country=US
persist.sys.localevar=
init.svc.recovery=running
init.svc.adbd=running
Finding update package...
I:Update location: /sdcard/ASUS_BUNDLE.zip
Opening bundle update package...
E:Can't open /sdcard/ASUS_BUNDLE.zip
(No such file or directory)
I:No factory bundle package.
I:Enable RSA key verification.
Installing update...
Finding update package...
I:Update location: /sdcard/EP201_SDUPDATE.zip
Opening update package...
I:1 key(s) loaded from /res/keys
E:failed to open /sdcard/EP201_SDUPDATE.zip (No such file or directory)
I:verify_file returned 1
E:signature verification failed
SD Installation aborted.
Check and format /storage to vfat if needed...
Mount /btmac successfully
Done.
I:timed out waiting for key input; rebooting.
shell@android:/ #
Hay que leer el segundo bloque (marcado en rojo) para ver cual es el error.
Espero que le sirva a alguien.