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Author Topic: Recovering from a bad bios flash: The hard way  (Read 23479 times)

Offline 0b00000111

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Recovering from a bad bios flash: The hard way
« on: September 05, 2009, 08:09:39 PM »
Hello,

As of yesterday, I pulled out my Asus EEE from Asus service center due to very high repair cost. Almost 200USD around 10,000pesos... But.... I am so happy that I had revived my Asus EEE... As from my story, the bootblock was erased and I tried all the tricks for bootblock recovery techniques I found on the net and without luck.

It took me two complete days to recover this little machine in a hard way. I opened my Asus EEE PC with the steps here: http://forum.eeeuser.com/viewtopic.php?id=6036

Then I saw the BIOS IC and removed it from the board using a soldering iron




From there, I obtained a datasheet from Winbond W25X40 4M-Bit Flash and read and studied all the instructions. From there, I developed the circuit, firmware, and software for flashing.




Here is the software created in C# I had just created this morning to flash my BIOS:



Here is the circuit I created (on breadboard hehe). I used a PIC16f628A (through UART @115200bps) because my parallel port is already damaged. Used SDCC as the compiler.




After programming and verifying using the software I created, I tried to temporarily wire it to see if it works:


And it worked!

My Asus EEE is up and running again!


I am so happy!!! ^_^

kung sino man magkaroon ng similar problems, pwede ko kayong matulungan... sobrang taga sa Asus Service Center...
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Recovering from a bad bios flash: The hard way
« on: September 05, 2009, 08:09:39 PM »

Offline 'yus

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Re: Recovering from a bad bios flash: The hard way
« Reply #1 on: September 05, 2009, 08:25:19 PM »
^ wow galing. :o
malaki talaga ang matitipid 'pag 'kaw mismo ay marunong magrepair.. :)
'kaw na lang ang mag-repair sa ibang units
tapos singilin mo ng halfthe price (100USD).. hehe ;D
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Re: Recovering from a bad bios flash: The hard way
« Reply #1 on: September 05, 2009, 08:25:19 PM »

Offline Google

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Re: Recovering from a bad bios flash: The hard way
« Reply #2 on: September 05, 2009, 08:28:24 PM »
grabe talaga abusado ng mga yan ;D

iba talaga pag technical ang linya mo ;D ;D

galng mo sis7 ;D ;D
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Re: Recovering from a bad bios flash: The hard way
« Reply #2 on: September 05, 2009, 08:28:24 PM »

Offline 0b00000111

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Re: Recovering from a bad bios flash: The hard way
« Reply #3 on: September 05, 2009, 08:33:26 PM »
kamuntikan na nga ako magwala sa Asus Service Center kahapon nung paalis na ako siningil pa ako ng 500pesos, diagnostic fee daw... ;D ;D ;D

at yesterday, di ako masyado makapag daldalan dito sa elab dahil sa worry ko dito kung marerevive ko pa... buti na lang at...



makakapang hijack na muli! ;D ;D ;D
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Re: Recovering from a bad bios flash: The hard way
« Reply #3 on: September 05, 2009, 08:33:26 PM »

Offline Google

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Re: Recovering from a bad bios flash: The hard way
« Reply #4 on: September 05, 2009, 08:41:08 PM »
buti napigil ka ng bf mo sis ;D ;D

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Re: Recovering from a bad bios flash: The hard way
« Reply #4 on: September 05, 2009, 08:41:08 PM »

Offline 0b00000111

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Re: Recovering from a bad bios flash: The hard way
« Reply #5 on: September 05, 2009, 08:41:58 PM »
Quote from: `6.99` on September 05, 2009, 08:41:08 PM
buti napigil ka ng bf mo sis ;D ;D



impakta ka ;D ;D ;D
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Offline john_xd

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Re: Recovering from a bad bios flash: The hard way
« Reply #6 on: September 05, 2009, 08:54:54 PM »
ang galing nman nyan!..palakpakan...congratulation!! poging pogi mo ;)
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Offline 0b00000111

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Re: Recovering from a bad bios flash: The hard way
« Reply #7 on: September 05, 2009, 08:55:23 PM »
maraming salamat... malaking tinulong sa akin ng proteus sa simulation at timing ng software SPI ;D ;D ;D
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Offline rdpzycho

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Re: Recovering from a bad bios flash: The hard way
« Reply #8 on: September 05, 2009, 09:10:32 PM »
^ galing. ;D

'di lang impakta at hijacker, mahusay pa sa hardware at software. ;D ;D ;D
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Offline RiDdLeR???

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Re: Recovering from a bad bios flash: The hard way
« Reply #9 on: September 05, 2009, 09:26:50 PM »
Dapat kasi at least may mga universal programmer na kayo that can specially program/reprogram flash memory chips as well as other rom and mcus.  Also learned it the hard way trying to modify my xbox360.  But I'm not as skilled and talented as 7 so I opted for the little bit more expensive way ...but hey the investment is worth it.
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Offline tiktak

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Re: Recovering from a bad bios flash: The hard way
« Reply #10 on: September 05, 2009, 09:34:44 PM »
ako naman ngayon ay namomroblema sa WRT54G na router na corrupt ang firmware sa update at di na ma ping at ayaw mabasa sa JTAG :(
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Offline kraze

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Re: Recovering from a bad bios flash: The hard way
« Reply #11 on: September 05, 2009, 09:44:01 PM »
Nice CutenaCute_7.
You dug deeper
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Re: Recovering from a bad bios flash: The hard way
« Reply #12 on: September 05, 2009, 10:19:39 PM »
ano bang nangyari manay7 bat na erase yong BIOS? jusy want to know to avoid it....
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Offline 0b00000111

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Re: Recovering from a bad bios flash: The hard way
« Reply #13 on: September 06, 2009, 02:35:21 AM »
Quote from: <')XXx< on September 05, 2009, 10:19:39 PM
ano bang nangyari manay7 bat na erase yong BIOS? jusy want to know to avoid it....

nag flash ako ng bios... andami na nyan process na natapos verification ng ROM file kung angkop sa motherboard, BIOS flashing done, then nung nasa bootblock portion na  all of the sudden nag hang sa 96% while writing sa bootblock area... around 1hr to 2hrs of waiting, nasa 96% pa rin... there is no way to abort... at based from experience, di umaabot ng oras ang flashing ng bios so I know there is something wrong...

nag uusap kami ni sir motion doon sa tipidpc, and yun nga, mahirap pag bootblock portion ang nadale... kahit ang bootblock recovery di gumagana...  at kung di nadale ang bootblock, malamang marecover ko pa ito using BootBlock Recovery ng AMI...

siguro sinadya ito ng pagkakataon para mapwersa akong gawin yung BIOS programmer na matagal ko ng pinapangarap ;D ayan binigyan ako ng rason para matuloy ang project hehehe ;D ;D ;D

magandang learning experience na rin heheheh... ;D ;D ;D
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Offline 0b00000111

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Re: Recovering from a bad bios flash: The hard way
« Reply #14 on: September 06, 2009, 03:01:38 AM »


eto yung programmer (close up look) hehehe :D
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Offline marcelino

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Re: Recovering from a bad bios flash: The hard way
« Reply #15 on: September 06, 2009, 10:11:58 AM »
Quote from: CutenaCute_7 on September 06, 2009, 03:01:38 AM


eto yung programmer (close up look) hehehe :D

ayos!  nag-aaral ng geography si manay7!!! hehehe ;D

baka naman gusto mong ishare ang schematic nyan... :D
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Offline 0b00000111

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Re: Recovering from a bad bios flash: The hard way
« Reply #16 on: September 06, 2009, 11:09:22 AM »
Quote from: marcelino on September 06, 2009, 10:11:58 AM
ayos!  nag-aaral ng geography si manay7!!! hehehe ;D

baka naman gusto mong ishare ang schematic nyan... :D

dapat ang patungan ko diyan sa bench ko dito sa bahay is yung poster ni Marian Rivera sa Ginebra at sayang din kasi malalagyan ng solder debris... hehehe.. at masisira pa ang concentration ko kaya World Map na lang nilagay ko para educational ;D ;D

simple lang schematic nito sis, Max232 + PIC16F628A, tapos yung output is may series resistor lang tapos deretcho na sa SPI Flash. (bit-banged yung SPI).
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Offline ♪ ♫ ♫ ♪ ♪ ♪ ♫ ♫ ♫

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Re: Recovering from a bad bios flash: The hard way
« Reply #17 on: September 06, 2009, 12:22:11 PM »
Quote from: CutenaCute_7 on September 06, 2009, 02:35:21 AM
nag flash ako ng bios... andami na nyan process na natapos verification ng ROM file kung angkop sa motherboard, BIOS flashing done, then nung nasa bootblock portion na  all of the sudden nag hang sa 96% while writing sa bootblock area... around 1hr to 2hrs of waiting, nasa 96% pa rin... there is no way to abort... at based from experience, di umaabot ng oras ang flashing ng bios so I know there is something wrong...

nag uusap kami ni sir motion doon sa tipidpc, and yun nga, mahirap pag bootblock portion ang nadale... kahit ang bootblock recovery di gumagana...  at kung di nadale ang bootblock, malamang marecover ko pa ito using BootBlock Recovery ng AMI...

siguro sinadya ito ng pagkakataon para mapwersa akong gawin yung BIOS programmer na matagal ko ng pinapangarap ;D ayan binigyan ako ng rason para matuloy ang project hehehe ;D ;D ;D

magandang learning experience na rin heheheh... ;D ;D ;D

ah..nag bios update ba kayo?

 nadale rin hp ko nyang mga bios updates nila, nag-ooverheat namn ang lumabas na problema nong hp ko....ang lesson ko don never na e update ang bios  ;D ;D ;D
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Offline 0b00000111

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Re: Recovering from a bad bios flash: The hard way
« Reply #18 on: September 06, 2009, 12:28:40 PM »
Quote from: <')XXx< on September 06, 2009, 12:22:11 PM
ah..nag bios update ba kayo?

 nadale rin hp ko nyang mga bios updates nila, nag-ooverheat namn ang lumabas na problema nong hp ko....ang lesson ko don never na e update ang bios  ;D ;D ;D


yup.. lesson learned talaga .. pero from what happened, ngayon di na ako takot mag bios flash ngayon ;D

at mas reliable pala yung flashing sa boot-up ng AMI kasi failsafe daw yun accdg to some websites (alt-F2 sa boot up)... pag nagbad flash ibabalik ka lang daw nya ulit doon sa start-up hanggang sa ma load nya yung correct bios.. at etong method na ito ginamit ko kahapon sa ASus EEE ko para matest ko lang hehehe (bios flash method ng PC, not yung ginawa ko)... successful naman hehehe ;D
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Offline paranz

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Re: Recovering from a bad bios flash: The hard way
« Reply #19 on: September 06, 2009, 12:33:24 PM »
ang supergaling mo MotherQueen. Kakainggit ang talent, hardware and software astig! :D
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Re: Recovering from a bad bios flash: The hard way
« Reply #19 on: September 06, 2009, 12:33:24 PM »
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