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psnap777

XBox Works but No Light Around Eject Button

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My XBOX turns on and works but the green light around the eject button does not come on. The system is a 1.0 version and has been successfully Tsoped. A red light comes on around the eject button when booting with the Helen 2017 disk, but I don’t ever get a green light under normal operation. Any idea what would cause this or how I can fix it?  Thanks. 

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There could be a busted or disconnected/dislodged wire from the connectors at either end of the front panel's signal cable.

The front panel connections can be seen at:

Please login or register to see this link.

Edited by KaosEngineer

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Thank you for replying and your advice. I pulled the front panel board and didn't find any loose wires or solder connections. Next I pulled a front panel board from another working XBOX that I have and tried it in the XBOX I'm working on and the result was the same; no green lights. So I'm guessing maybe it's a problem with the motherboard. I'm going to pull the motherboard and look at the solder joints under the port that the front panel plugs in to. Is there anything else you can think of that might be the problem?

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Does L6 on the sister controller board have anything to do with the lights? I just noticed the component there is missing.

IMG_1227.JPG

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The daughterboards only found on v1.0 consoles are for the controller ports.  Must be something else on the motherboard that's broken - damaged/corroded trace.

Check for continuity from pin 2 of the PIC processor at location U7B2 to the RED LED contact of the front panel connector - J2G2. And, same for PIC pin 3 to the GREEN LED front panel connector pin. 

Update: Hmm, not quite right. Not sure if the PIC connects directly to the front panel connector pins.  There are left and right RED and GREEN LED connections on the front panel connector.  LED driver circuitry, a transistor, may exist between the PIC and those front panel pins.

Edited by KaosEngineer

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Messed up edit.

 

Update for V1.1 motherboard:

Q2V1 on bottom of MB is the GREEN LED driver transistor.

Q2V2 on bottom of MB is the RED LED driver transistor.

Please login or register to see this code.

20180432 3:14PM CDT

A 1.0 motherboard is most likely a bit different as it had the daughterboards for the USB hubs to the front control panels.

Pics of the 1.1 Mother board top and bottom J2G2 Front Panel connector:

Top5ade3f7c0c31e_ogXboxV1.1Motherboard(top)FrontPanelConnector(J2G2).thumb.png.aac85455e4704fc2f4ffedf63c2eafcd.png

Bottom5ade3f77aa4c4_ogXboxV1.1Motherboard(bottom)FrontPanelConnector(J2G2).thumb.png.cad7cde7b6a9beba448851e850b6ad7b.png

Edited by KaosEngineer

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On 4/23/2018 at 1:17 PM, KaosEngineer said:

Messed up edit.

 

Update for V1.1 motherboard:

Q2V1 on bottom of MB is the GREEN LED driver transistor.

Q2V2 on bottom of MB is the RED LED driver transistor.

Please login or register to see this code.

20180432 3:14PM CDT

A 1.0 motherboard is most likely a bit different as it had the daughterboard for the USB hub that connected the controller ports.

Pics of the 1.1 Motherboard top and bottom J2G2 Front Panel connector:

Top5ade3f7c0c31e_ogXboxV1.1Motherboard(top)FrontPanelConnector(J2G2).thumb.png.aac85455e4704fc2f4ffedf63c2eafcd.png

Bottom5ade3f77aa4c4_ogXboxV1.1Motherboard(bottom)FrontPanelConnector(J2G2).thumb.png.cad7cde7b6a9beba448851e850b6ad7b.png

 

Update (20180425 - fixed a few typos above. No new info.

Edited by KaosEngineer

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I am having the exact same issue, havent fixed it yet tho and Im not really sure whats causing it, its for sure not the yellow cable for the light ring.

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1 hour ago, dag05 said:

I am having the exact same issue, havent fixed it yet tho and Im not really sure whats causing it, its for sure not the yellow cable for the light ring.

What version Xbox?

There are several possibilities to what's causing this problem.  

I'd try UnleashX dashboard's System -> Settings -> System -> Test LED option to cycle through the list of available color options; see which don't work properly.

You can use this menu item and test the output of the PIC processor and the drive transistor base and collector voltage levels.  The RED and GREEN LED drive transistors are on the bottom side of the motherboard. :(

A few possible problems

Trace carrying the signal from the PIC processor (v1.0-1.5)/Xyclops(v1.6) (System Management Controller) to the drive transistor may be broken or corroded, dead transistor, open resistor, and/or burnt out LED.

Edited by KaosEngineer

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Another possibility, the BIOS is modified to disable the power ring LEDs (hardmod/tsop only) or after starting the dashboard it is set up to turn off the LEDs.

Softmodded the LED should still be green before the replacement dashboard starts.

Edited by KaosEngineer

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Thank you so much for all the information you shared KaosEngineer. It has been quite helpful. Unfortunately I haven't been able to fix the problem yet. I ran the Test LED you mentioned and the only lights that function are red; neither orange nor green worked. I'm probably going to have to pull the motherboard again and see if I can find any traces that look bad. Although I have done this twice and have not found anything just by visual inspection. My motherboard version is a 1.0 by the way. I don't know if anyone else experiencing this same problem has had any luck figuring it out, but please post if you have. Thanks.

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Since only red works, either a bad PIC processor, a broken trace for the GREEN LED control line from the PIC (U7B2), broken/disconnected series resistor between the PIC and drive transistor base pad, burnt out GREEN LED drive transistor near the Front Panel connector (solder side of the motherboard) or current limiting resistors.

Since neither side lights, I doubt it's the current limiting resistors for the LEDs.  There are two one for each side of the lighted ring on the front panel.  Most likely the trace from the PIC to drive transistors opened/cracked somewhere along its long route or the transistor.

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I pulled the board again and found the problem. The clock capacitor strikes again.  It damaged the traces controlling the lights around the eject button. The only one not damaged is the red light trace. Unfortunately repairing this is beyond my experience / ability at this time. So I'm just going to set it to use the red light for everything in UnleashX settings since it's the only light still working.  Just wanted to share what was causing the problem incase anyone else runs into this. KaosEngineer had mentioned this as a possibility in one of his earlier posts and it turns out he was right.

IMG_1244.JPG

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Board Life Status


Board startup date: April 23, 2017 12:45:48
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