How to boot an unbootable P900? - GSM-Forum

Lead · 05-17-2005, 04:24

This problem may arise after flashing an original P910 AVR flash which has not been specially prepared for uploading into a P900 phone. The problem will not occur if you disable the Relock RSA option before flashing.

The solution is to use a testpoint. There is no software-only way because of a CID-mismatch. Just connect the testpoint to GND while booting the phone and wait until Cruiser finishes bypassing boot authority check. Then disconnect it.

ryumahon · 05-17-2005, 04:58

tnx for the tip mate!!! this is a very big contribution again to the entire gsm world!!!!

tnx so much!!!

***acyl2000*** · 05-17-2005, 07:38

thx for the information!!!!

Softway · 05-17-2005, 07:52

definitely use full information. thanks for that

SonycodeS · 05-17-2005, 08:53

Thanks man, this really saved the day

Ron2pet · 05-17-2005, 08:59

Lead,

Thanks a lot!

Very usefull!

br,
ron2pet

mohammadmouazen · 05-17-2005, 11:29

hi

thanks lead

tested in phone p900 and repair and work 100%

br

ricson · 05-17-2005, 15:30

at last a solution cruiser still the best

thanks lead

evan_silbert · 05-17-2005, 19:52

Very nice information indeed!!

Thanks, Lead

Skaza · 05-18-2005, 11:33

hi this testpoint is old and not work all P9xx i have 2 anoter testpoint

sory me english

[email protected]

Lead · 05-18-2005, 13:24

This testpoint is directly connected to the RST# flash pin. It is separated from the CPU via a 15K resistor.
By grounding DATA[0] or by using OE# or CE# pins you risk AVR CPU damage.

Do you have any other solution?

taihv · 05-18-2005, 17:38

That's really helpfull for all!! Maybe i will have a P900 dead after flashing original P910 AVR at tomorrow morning!!! I'll test and post reasons soon!!!!
Thanks for ur support, Lead!!!

Regards

muppet · 05-18-2005, 23:58

Quote:

Originally Posted by taihv

That's really helpfull for all!! Maybe i will have a P900 dead after flashing original P910 AVR at tomorrow morning!!! I'll test and post reasons soon!!!!
Thanks for ur support, Lead!!!

Regards

You should not flash P910i AVR to P900 though!! The only P910i image you should be flashing is the patched one Lead made for the P900->P910 conversion.

Or did I misunderstand your post?

evan_silbert · 05-19-2005, 00:05

Tim, I think he was saying that someone else ruined the phone by flashing it with P910i flashes and it will be brought to him tomorrow for repair...

or did I misunderstand?

muppet · 05-19-2005, 00:07

Oh yes, you'd be right.

Again hence why I choose this username...

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05-17-2005, 04:58	#2 (permalink)
ryumahon No Life Poster Join Date: Apr 2001 Location: Sun Age: 44 Posts: 2,773 Member: 4021 Status: Offline Thanks Meter: 782	tnx for the tip mate!!! this is a very big contribution again to the entire gsm world!!!! tnx so much!!!

05-17-2005, 07:38	#3 (permalink)
*acyl2000* Super Moderator Join Date: Aug 2000 Location: Malaysia Posts: 2,809 Member: 1922 Status: Offline Sonork: 100.64645 Thanks Meter: 692	thx for the information!!!!

05-17-2005, 07:52	#4 (permalink)
Softway No Life Poster Join Date: May 2005 Posts: 2,681 Member: 143889 Status: Offline Sonork: 100.1584685 Thanks Meter: 341	definitely use full information. thanks for that

05-17-2005, 08:53	#5 (permalink)
SonycodeS Freak Poster Join Date: Oct 2004 Location: Wherever i may roam... Age: 49 Posts: 103 Member: 88984 Status: Offline Thanks Meter: 7	Thanks man, this really saved the day

05-17-2005, 08:59	#6 (permalink)
Ron2pet No Life Poster Join Date: Nov 2002 Location: Philippines Posts: 1,770 Member: 17609 Status: Offline Sonork: 100.64817 Thanks Meter: 1,694	Lead, Thanks a lot! Very usefull! br, ron2pet

05-17-2005, 11:29	#7 (permalink)
mohammadmouazen No Life Poster Join Date: Dec 2003 Location: Jordan Posts: 790 Member: 45682 Status: Offline Thanks Meter: 54	hi thanks lead tested in phone p900 and repair and work 100% br

05-17-2005, 15:30	#8 (permalink)
ricson Banned Join Date: Dec 2002 Location: SWITZERLAND Age: 55 Posts: 1,561 Member: 18329 Status: Offline Thanks Meter: 144	at last a solution cruiser still the best thanks lead

05-17-2005, 19:52	#9 (permalink)
evan_silbert No Life Poster Join Date: Feb 2003 Location: Boston Posts: 5,027 Member: 21920 Status: Offline Thanks Meter: 10	Very nice information indeed!! Thanks, Lead

05-18-2005, 11:33	#10 (permalink)
Skaza No Life Poster Join Date: Dec 2002 Location: Poland Age: 42 Posts: 531 Member: 19041 Status: Offline Thanks Meter: 23	hi this testpoint is old and not work all P9xx i have 2 anoter testpoint sory me english [email protected]

05-18-2005, 13:24	#11 (permalink)
Lead No Life Poster Join Date: Aug 2008 Age: 52 Posts: 3,292 Member: 1841 Status: Offline Thanks Meter: 469	This testpoint is directly connected to the RST# flash pin. It is separated from the CPU via a 15K resistor. By grounding DATA[0] or by using OE# or CE# pins you risk AVR CPU damage. Do you have any other solution?

05-18-2005, 17:38	#12 (permalink)
taihv Registered User Join Date: Oct 2003 Location: Vietnam Age: 47 Posts: 963 Member: 40808 Status: Offline Thanks Meter: 10	That's really helpfull for all!! Maybe i will have a P900 dead after flashing original P910 AVR at tomorrow morning!!! I'll test and post reasons soon!!!! Thanks for ur support, Lead!!! Regards

05-19-2005, 00:05	#14 (permalink)
evan_silbert No Life Poster Join Date: Feb 2003 Location: Boston Posts: 5,027 Member: 21920 Status: Offline Thanks Meter: 10	Tim, I think he was saying that someone else ruined the phone by flashing it with P910i flashes and it will be brought to him tomorrow for repair... or did I misunderstand?

05-19-2005, 00:07	#15 (permalink)
muppet No Life Poster Join Date: Oct 2003 Location: Auckland, New Zealand Posts: 3,034 Member: 42570 Status: Offline Thanks Meter: 11	Oh yes, you'd be right. Again hence why I choose this username...