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No Title (You should edit this question)i had same problem.can connect external monitor without battery only..and my screen mbp working fine + xternal...
Respuesta a "iPhone4 won't restore and shows Error 21"The hosts file may also be blocking the iTunes Store. If you want to have Windows try to restore the hosts to default, follow the "FixIt" in How do I reset the hosts file back to the default?. Note: Work systems may put information into the hosts file. Consult whomever is responsible for supporting Windows on your system before resetting the hosts file to default. If restoring the defaults did not resolve the issue, you can find your hosts file at C:\WINDOWS\SYSTEM32\DRIVERS\ETC . Select the hosts file. Choose Edit > Copy, and then choose Edit > Paste. There should now be a duplicate of the hosts file named "Copy of hosts" (Windows XP) or "hosts -Copy" (Windows Vista/7). Drag the original hosts file to your Desktop. If Windows needs your permission to continue, click Continue. Drag the "Copy of hosts" (Windows XP) or "hosts -Copy" (Windows Vista/7) to the Desktop. Right-click "Copy of hosts" (Windows XP) or "hosts -Copy" (Windows Vista/7) and choose Open. You may be prompted to choose the program you want...