Having problems with your Acer Aspire One PC Notebook ?

Acer aspire zg5 power is on but screen is black


Answers :

If your Aspire One will not start and you get a black screen, IT IS NOT DEAD, hopefully! It has a problem booting.
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\012 Here is the procedure posted some time ago by a guy call Macles. His blog page seems to have 'disappeared'. I have revived my AOA150/ZG5 a number of times using this procedure.
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\012 Although the Aspire One is a bit old now I am posting this here in the hope someone with this problem will find it and fix their Aspire One. You need to read the instructions carefully.
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\012 Acer Aspire One BIOS Recovery
\012
\012 The Acer Aspire One has a built-in BIOS recovery routine, which can boot into a minimal BIOS environment via a special boot block to re-flash the BIOS, even if the system does not pass POST and does otherwise not boot anymore. This procedure is also known as Crisis Disk.
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\012 First format an USB flash drive with FAT. It does not need to be bootable.
\012
\012 Download the latest BIOS, and extract all files. Put both FLASHIT.EXE and the BIOS file with FD suffix in the root directory of the flash drive. The files must not be in a folder. Rename the BIOS file to ZG5IA32.FD before proceeding. It only works with this exact filename.
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\012 Turn the AA1 off, and verify both battery and AC adapter are plugged in.
\012
\012 Press Fn and Esc simultaneously, keep them pressed and press the power button. Release Fn+Esc after a few seconds. The power button starts blinking at this point. Press it once. The AA1 will now access the files on the flash drive and initiate flashing the BIOS. After a while the power button stops blinking, and the AA1 reboots by itself. Wait patiently.
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\012 If it doesn't reboot, but keeps blinking, wait at least a few minutes before turning it off, and try again.
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\012 The bios is available here :-
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\012 http://global-download.acer.com/GDFiles/BIOS/BIOS/BIOS_Acer_3310_A_AOA110%20&%20AOA150.zip?acerid=633850493862245097&Step1=NETBOOK,%20CHROMEBOOK&Step2=ASPIRE%20ONE&Step3=AOA150&OS=ALL&LC=en&BC=ACER&SC=EMEA_27#_ga=1.14312051.514957353.1425219603
For the Acer Aspire One ZG5 (AOA110 / AOA150), the by far most prominent case of "black screen, no bootup at all" is the BIOS configuration corruption case, which occurred for an annoyingly high number of people. Such a "more minor" issue can be fixed via screen-less USB-based BIOS emergency flashing, ideally with a newer BIOS version which is less prone to that issue (see elsewhere for instructions on how to do this BIOS operation restore on ZG5).
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\012The case that I will be talking about now instead is (one case of) complete hardware damage resulting in unresponsive machine.
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\012For me, this happened during a very hot summer (37C), with Firefox having 50+ tabs open, on this weak machine (Yeah Baby, that's Linux performance! ;)
\012When I returned, the machine had turned completely black and remained unresponsive, no matter what I tried.
\012That was the moment when I realized that after the last disassembly I seemed to have forgotten to have the keyboard properly clipped in, which caused a thermal resistance/disconnect of the aluminum keyboard parts - THUS NEVER FORGET TO HAVE NOTEBOOK KEYBOARDS PROPERLY CLIPPED INTO THE CASE!
\012And since ZG5 seems to have no thermal sensors / emergency shutdown support whatsoever, this thermal overheating issue was fatal/lethal.
\012
\012The only functionality left remaining was power switch (LED turning properly green when switching on), yet there was no activity whatsoever, such as visible LED access to USB sticks etc. (this is how you can tell apart the total damage case from the very frequent BIOS corruption case above). The EC (Embedded Controller) 4 second ACPI power switch shutdown still worked, though, so the EC likely was fine.
\012
\012Upon closer microscope-based inspection I noticed that IC U1 near PSU connector / outlet and VGA connector had a completely cracked-open case (semi-visible side-only damage at the side oriented towards the large capacitor, with copper parts leaking out even!!), with only minor damage seen at IC case top side.
\012IC U1 appears to be IP4772 / IP4772CZ16, of NXP semi-conductors,
\012according to both my investigation and the list at http://www.electronicproducts.com/Acer_Aspire_One_ZG5_Netbook_-whatsinside_text-78.aspx ,
\012which describes it as
\012\012\012\012\011\012\011\011Motherboard, Top\012\011\012\011\012\011\011I/O & Interface\012\011\012\011\012\011\011Integrated Circuit\012\011\012\011\012\011\011Analog\012\011\012\011\012\011\0111\012\011\012\011\012\011\011NXP Semiconductor\012\011\012\011\012\011\011IP4772CZ16\012\011\012\011\012\011\011Video Interface Device - ESD Protect/Level Shifter/Buffer\012\011\012\011\012\011\011NXP, 4772, 01 04, uG805\012\011\012\011\012\011\011SSOP\012\011\012\011\012\011\0110.64\012\011\012\011\012\011\0114.90\012\011\012\011\012\011\0113.90\012\011\012\011\012\011\0111.55\012\011\012\011\012\011\011 Visit URL\012\011\012\012\012\012My IC marking is
\012NXP
\0124772
\01204 13
\012uG802
\012
\012Since that IC handles VGA/DVI functionality i.e. is display related,
\012I guess that it inhibited machine operation sufficiently severely and thus completely, and replacing it will hopefully manage to fix things (I don't have replacement parts / components currently).
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