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LPC pin 5 only 0.17V


ISAK.M
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Are you sure you are measuring the correct pin of the LPC Debug port?

5Vdc is on pin 6, not pin 5.

LPC Debug Port - xboxdevwiki

Pin 1 has the square pad.

LPC Debug Port - Pin Layout
Name Pin Pin Name
SERIRQ (v1.0) 16 15 3.3V
SDA 14 13 SCL
GND 12 11 LAD0
LAD1 10 9 3.3V
LAD2 8 7 LAD3
5V 6 5 LRESET#
PWR (v1.6) 4 3 LFRAME#
GND 2 1 LCLK
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47 minutes ago, ISAK.M said:

https://imgur.com/a/T7rCXkB

I followed this:

 

And it says it should be 3.3V

All of the solder joints look bad - cold solder joints.  The solder is balled up on top of the pin header pins not making a good connection to the LPC Debug port signals.

Edit: The solder and pad were both not hot enough for the solder to flow into the plated through hole and around the pin header pin to make a good connection. 

Reheat / reflow them.  No more solder is needed.

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8 hours ago, KaosEngineer said:

Ok, what does your Xbox do when powering it on?

 

Edit: Disconnect the ground pad connection end of the D0 wire.  Does the console boot without it connected?

The Xbox reboots twice then blinks red/green.

The console does not boot without it connected as I flashed the wrong BIOS. I flashed a BIOS for a 1.1 while I have a 1.4. It does not boot with it connected either bcs of this 0.17V on pin 5

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2 hours ago, ISAK.M said:

The Xbox reboots twice then blinks red/green.

The console does not boot without it connected as I flashed the wrong BIOS. I flashed a BIOS for a 1.1 while I have a 1.4.

Which BIOS did you flash to the console's TSOP?

The BIOSes you should use are MULTI_VERSION that run on v1.0-1.4 consoles and some of them have a separate v1.6 specific release too (e.g.,EvolutionX's M8plus_16.bin and Team Xecuter's, x2_5035_v16plus_512k.bin).

 

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1 hour ago, KaosEngineer said:

Which BIOS did you flash to the console's TSOP?

The BIOSes you should use are MULTI_VERSION that run on v1.0-1.4 consoles and some of them have a separate v1.6 specific release too (e.g.,EvolutionX's M8plus_16.bin and Team Xecuter's, x2_5035_v16plus_512k.bin).

 

https://legacy.downloads.diomtec.com/homebrew/xbins/Console%20Based%20Applications/bios/evolution-x/_v1.1/

I rushed things and flashed this

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4 hours ago, ISAK.M said:

Yeah, not good - you needed the latest BIOS in the MULTI_VERSION subfolder.  

 

6 hours ago, ISAK.M said:

I should add that even the via that is connected to pin 5 also shows 0.17V

Like there is a bigger issue other then my soldering here

Remove the modchip from the pin header.  Does pin 5 stay at 0.17V?

 

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Well yeah its 0.17V no matter what, except not always. I measured what it is during those 2 first boots before it reboots a 3rd time and then just sits there.

1st boot: 2.2V

2nd boot: 3.3V

3rd boot: 0.17V

So something just makes it instantly dip down to 0.17 but idk what it is

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1 hour ago, ISAK.M said:

Well yeah its 0.17V no matter what, except not always. I measured what it is during those 2 first boots before it reboots a 3rd time and then just sits there.

1st boot: 2.2V

2nd boot: 3.3V

3rd boot: 0.17V

So something just makes it instantly dip down to 0.17 but idk what it is

Could be bad resistor or capacitor.

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https://imgur.com/a/3NAcfiH

I found a random blob of solder that I dont remember putting there that was shorting 2 points so I managed to sort of melt and scrape it off so thats not shorting anymore.

I did also find that R7D10 also shows 0.17V.

This part has solder points aswell and I dont remember what I was doing here its so random. Its not connecting tho so something else is forcing R7D10 to be 0.17V

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