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OG Xbox Forums => Hardware Forums => General Hardware/Technical Chat => Topic started by: Burned_Alive on August 20, 2004, 04:31:00 AM

Title: Correctly Testing A Power Supply?
Post by: Burned_Alive on August 20, 2004, 04:31:00 AM

I have a v1.0-1.1 xbox and it is dead (wont power up at all) and im currently unsure whether its the psu or the motherboard, ive done a continuity test on the fuse on the psu which comes back fine, but im unsure how to properly test if the psu is putting any power out.....

What setting should i put the multimeter on and where should i be testing?

I did a search and looked through the tuts, but couldnt find anything covering this

Thanks in advance!  

Title: Correctly Testing A Power Supply?
Post by: dsscircuits on August 20, 2004, 04:49:00 AM

Somewhere here there is a list of what voltage is on what pin of your PSU I don't remember off hand. I know the power for you DVD or Hard Drive plugs is going to be 12V so turn your meter to 20 volts DC unless its auto ranging then just turn it to DC. ! question did your Xbox just quit out of the blue or were you working/ soldering on it?

You might look on the home page under tutorials, IIRC there is a tutorial on converting a 1.0-1.1 power supply to a 1.2-1.5 power supply that tute might have voltages for your pin outs

Title: Correctly Testing A Power Supply?
Post by: Burned_Alive on August 20, 2004, 05:17:00 AM

I wasnt working on it, i bought the xbox as faulty and was told that:

"xbox was working fine until a few days ago, tried to switch it on but nothing happens...no life in it at all"

So i bought it cheap and figured its probably a psu fault that can be easily repaired, if not ill just split it and sell the bits, ill double check the tutorials

Title: Correctly Testing A Power Supply?
Post by: dsscircuits on August 20, 2004, 06:01:00 AM

Has the Xbox ever been opened before?

Title: Correctly Testing A Power Supply?
Post by: Burned_Alive on August 20, 2004, 06:06:00 AM

Yeah, it stopped working whilst there was a modchip in it, he took the chip out and still nothing

Sorry, i guess thats important!

Title: Correctly Testing A Power Supply?
Post by: Burned_Alive on August 20, 2004, 09:56:00 AM

Just having a look over the board, the top is fine, obvious where d0 and the chip were soldered but no damage to the area that i can make out (even with a magnifying glass)

But having checked out the bottom there appears to be a bridge and some trace damage.....not sure if this is enough to stop the box booting but i presume it is...

Areas circled in red are broken traces? and the blue circle is the bridge:


I presume it should look like this:


Is this an easy enough repair or will it be fried?

The area to the fair right also looks messy but appears to be no damage

Title: Correctly Testing A Power Supply?
Post by: Burned_Alive on August 20, 2004, 11:14:00 AM

Guess i should've looked a bit further! Was cleaning the box up and spotted this nice big flash mark......



Then check the PSU and.....




So i guess thats the problem, even though the damage on the bottom isnt good news i dont think its effecting it, so time to source a new psu i guess!

Title: Correctly Testing A Power Supply?
Post by: wup on August 20, 2004, 11:16:00 AM

lol, ya that is more then enough to stop your xbox from working, that's some serious damage done to the board. I think this one might be unrepairable .

::Edit:: I see you posted pics of the psu well i was typing my previous message, anyways I'm pretty sure you bought a completely ruined system, i am 99.9% sure that the mobo damage will make it not work even with a working psu.

Title: Correctly Testing A Power Supply?
Post by: Burned_Alive on August 20, 2004, 11:27:00 AM

I guess ive got nothing to lose by trying out a new psu, he said it suddenly stopped working, which is definitely explained by the blown psu!

Whether or not the trace damage is effecting it remains to be seen...

Title: Correctly Testing A Power Supply?
Post by: thedustycelt on August 20, 2004, 12:27:00 PM

The trace damage is repairable. You are correct with your proposed repair pic. It looks like he couldn't figure out where the alt d0 was...

And he sucked with an iron.  

I am not sure off the top of my head what the other two traces are, but the alt d0 trace being broken will keep it from booting the original TSOP. It is possible that the board was working with a mod chip in place. The broken traces look like they all go to the TSOP, so they wouldn't be needed if you were booting off a chip.

If it were me, I would go ahead and repair the traces (asuming that you are good with an iron). Read the trace repair guides and make sure to use flux and 30 gauge wire.

As far as the PSU, you might be able to replace the fried component, but personaly I would just swap it out for a good supply. (With that kind of damage, it is dificult to tell if there is further damage that you cant see...)

It is rewarding to repair a trashed box!
Cheers  

Title: Correctly Testing A Power Supply?
Post by: thedustycelt on August 20, 2004, 12:44:00 PM

Here is a pic of a good bottom of the board that I found if you need it...

Title: Correctly Testing A Power Supply?
Post by: Burned_Alive on August 20, 2004, 02:58:00 PM

Thanks!

Are the solder spots inline on the trace important? or can i just run the trace straight through that bit?

Title: Correctly Testing A Power Supply?
Post by: thedustycelt on August 20, 2004, 03:06:00 PM

No the pads arn't important. You can just bridge it with some wire. They are there for testing in the factory...

Title: Correctly Testing A Power Supply?
Post by: Burned_Alive on August 20, 2004, 03:17:00 PM

Ok cool, thanks alot, i really appreciate your help

Looks like it wont be too hard to fix, might use the conductive paint trick instead or grab some kynar

Thanks again!

Title: Correctly Testing A Power Supply?
Post by: thedustycelt on August 20, 2004, 03:58:00 PM

Personaly I don't like the conductive paint. It always has some resistance and on sensitive electronics it dosn't seem to work as well.

Title: Correctly Testing A Power Supply?
Post by: Burned_Alive on August 27, 2004, 09:29:00 AM

OK, got some kynar and fixed the traces (at least im pretty sure i did, the light sequence changed since i soldered anyway!) and also a new psu

now when i turn the xbox on i get green briefly, then just red flashing

if im reading correctly, this means the the eeprom is fucked?

If so...where can i get a eeprom for a v1.0 pal xbox (can be banned off live, dont care...just to run the box)

...and how do i restore it?

Cheers

Title: Correctly Testing A Power Supply?
Post by: triggernum5 on August 27, 2004, 09:56:00 AM

To fix a corrupted eeprom you need access to a chip, and a means to flash it without your currntly screwed xbox..  When you have this, PM me, and I will guide you further.. (Or if you're self sufficient, get xbtool and 4981)

Title: Correctly Testing A Power Supply?
Post by: Burned_Alive on August 27, 2004, 11:39:00 AM

Ok, i installed a chip flashed with a 4981.06 bios embedded with a banned eeprom i found on here and with the modchip enabled it boots, but then comes up with error 06 (hard drive)

it does this for any hard drive i put in it (original locked or a stock and a 120gb that are both unlocked)

it wont boot evox off dvd either

am i doing something wrong?

Title: Correctly Testing A Power Supply?
Post by: triggernum5 on August 27, 2004, 11:41:00 AM

QUOTE

Correctly Testing A Power Supply? Burned_Alive 17 142 27th August 2004 - 01:42 PM Last Post by: Burned_Alive

Does anybody else laugh when they see this on the forum list..

Title: Correctly Testing A Power Supply?
Post by: Burned_Alive on August 27, 2004, 11:45:00 AM

Fortunately for me, thats not where my name originates from!

Any idea on my problem ?

Title: Correctly Testing A Power Supply?
Post by: thedustycelt on August 27, 2004, 11:51:00 AM

Wow... Error 6 with a harddrive that you know for sure is unlocked...

I am stumped...

I would try embedding a different eprom image, mabey try a different bios.

Also double check that you have the drive set to cable select (If this were wrong though you should get a 7 or 8)

The only other thought is that perhaps there is a solder splash or somthing. look especialy hard at the area around the IDE connector. and the traces leading away both on top and bottom.

Title: Correctly Testing A Power Supply?
Post by: Burned_Alive on August 27, 2004, 11:58:00 AM

I unlocked both of them with evox before i took them out of my own xbox

in theory the two i thought i'd unlocked should boot right?

EDIT: just tried the "unlocked" drives in a working xbox (but not the one they came out of), and they give error code 6 too????

Title: Correctly Testing A Power Supply?
Post by: thedustycelt on August 27, 2004, 12:04:00 PM

QUOTE

in theory the two i thought i'd unlocked should boot right?

absolutly.

sounds like the drives arn't actualy unlocked.

Title: Correctly Testing A Power Supply?
Post by: Burned_Alive on August 27, 2004, 12:10:00 PM

Ok just put them in the xbox they originally came out of and when i try to unlock them in evox it says done....but still registers lock enabled under settings......

Guess ill try configmagic or something!!

Title: Correctly Testing A Power Supply?
Post by: Burned_Alive on August 27, 2004, 12:52:00 PM

Any way of reusing the locked hard drive?

(i dont have the eeprom as its scrambled and i dont have the hdd key)

Title: Correctly Testing A Power Supply?
Post by: Burned_Alive on August 28, 2004, 05:40:00 AM

Ok, now im really screwed.

Got everything up and running and tried to flash the eeprom.

Its not having any of it.

Tried the reflash technique: FAILED

Tried eepromer: FAILED

Tried configmagic: wouldnt load because it couldnt find an eeprom to read

Is it fucked?

Can i buy a replacement chip?

Title: Correctly Testing A Power Supply?
Post by: Burned_Alive on August 28, 2004, 05:50:00 AM

Im actually now wondering if the broken traces on the bottom are something to do with the eeprom?

Maybe i didnt resolder them completely right? (even though its booting now)

Title: Correctly Testing A Power Supply?
Post by: triggernum5 on August 28, 2004, 07:40:00 AM

You don't even need an eeprom unless you want to run it without a chip..  But 24C02's are cheap if you have a means to program one..  (A modded xbox can program anything onto a blank eeprom with EEPROM Magic..  I suggest that tool for the times when Config Magic refuses to run...

Title: Correctly Testing A Power Supply?
Post by: Burned_Alive on August 28, 2004, 09:30:00 AM

Im selling it on so i would prefer to have it completely up and running.

I have now successfully flashed the eeprom with both eepromagic and eepromer, but afterwards it still wont boot and configmagic wont load because "invalid xbox version specified"

Does this mean the eeprom is toast?

Title: Correctly Testing A Power Supply?
Post by: Burned_Alive on August 28, 2004, 09:41:00 AM

HAHA

Scratch what i said!

The eeprom could be toast....who knows.....

IF ONLY IT WAS ATTACHED TO THE MOTHERBOARD!

I just checked the motherboard and I guess whoever installed the chip for the guy before me, nicked off with his eeprom, lmao!

So where can i get one of those eeprom chips in the uk?

Man, this is turning into a huge mission, im enjoying it though!

Title: Correctly Testing A Power Supply?
Post by: triggernum5 on August 28, 2004, 10:37:00 AM

haha..  I dunno what shipping is, but they're way less than a dollar from here: http://www.jameco.co...roductId=135697

Title: Correctly Testing A Power Supply?
Post by: Burned_Alive on August 28, 2004, 11:17:00 AM

Title: Correctly Testing A Power Supply?
Post by: triggernum5 on August 28, 2004, 12:40:00 PM

Title: Correctly Testing A Power Supply?
Post by: The iNSOMNIAc on August 28, 2004, 12:56:00 PM

Maplins and RS are 2 component suppliers that should carry stock in the uk.

Title: Correctly Testing A Power Supply?
Post by: Burned_Alive on August 28, 2004, 01:19:00 PM