JIIE Posted December 26, 2024 Report Share Posted December 26, 2024 Hi New here and looking for help. My two sons are home for Christmas. As every year they love to play some Burnout on Xbox. The first day it worked as usual, but yesterday it was completely dead. The power cord is working. Tested with multimeter. I’ve taken it apart trying to trace with multimeter. Not really sure what I’m doing. I attach some images. There is a wire soldered inside. Is it a mod? What might be the reason and can I fix it right away? Any guide out there? Jimmy Quote Link to comment Share on other sites More sharing options...
Zac_The_Guy Posted December 26, 2024 Report Share Posted December 26, 2024 I'm not familiar with mods on the XBOX, but I am a bit with it's tech and issues. Looks like there IS a modchip inside the thing. As for the wire, it might be some sort of bypass for traces? Or it could be a bypass for the modchip. Not sure. It seems like there's a...burnmark next to the wire? Better pictures could help! What did you test with a multimeter? Was it the power supply, because that could be the problem. Quote Link to comment Share on other sites More sharing options...
lopenator Posted December 26, 2024 Report Share Posted December 26, 2024 check these transistors https://www.ogxbox.com/forums/index.php?/topic/7810-xbox-16-dead-no-power/&do=findComment&comment=43385 Quote Link to comment Share on other sites More sharing options...
miguelito Posted December 26, 2024 Report Share Posted December 26, 2024 Hi. The capacitors, the larger ones close to the heatsink are bumpy,this is a sign for degradation these shall be changed. It is ok to have those wires if it is modded. Can you measure voltages on the Power supply? Disconnect the hard disk power supply (red,yellow and black wire harness connector); Between Red and Black wires you should measure 5V. Between yellow and black you should have 12V, with these measurements you can discard an issue on the power supply and focus only on those large capacitors I mentioned Quote Link to comment Share on other sites More sharing options...
SS_Dave Posted December 26, 2024 Report Share Posted December 26, 2024 (edited) 21 hours ago, JIIE said: The cap's in this photo need to be replaced The 3 closer to the heat sink are the 2.5 volt CPU/GPU supply and the 2 next to the 20 pin connector are the main 5 volt supply and without the 5 volt supply working properly the power supply will shut down. The reason is the 1.6 power supply needs to see a power ok signal from the main board almost as soon as the mains is applied and any delay to charge faulty caps will make it appear to be dead. Cheers SS Dave Soft modding is like masturbating, It gets the job done but it's nothing like the real thing. Edited December 27, 2024 by SS_Dave More info Quote Link to comment Share on other sites More sharing options...
MadMartigan Posted December 27, 2024 Report Share Posted December 27, 2024 If none of the above suggestions work, you can try this Quote Link to comment Share on other sites More sharing options...
JIIE Posted January 2 Author Report Share Posted January 2 On 12/26/2024 at 3:20 PM, miguelito said: Hi. The capacitors, the larger ones close to the heatsink are bumpy,this is a sign for degradation these shall be changed. It is ok to have those wires if it is modded. Can you measure voltages on the Power supply? Disconnect the hard disk power supply (red,yellow and black wire harness connector); Between Red and Black wires you should measure 5V. Between yellow and black you should have 12V, with these measurements you can discard an issue on the power supply and focus only on those large capacitors I mentioned Hi. Finally got some time to try this. I have full power on the two first pins. I switch my multimeter to DC, setting 20. There are no reading either on red/black, yellow/black. I checked a random battery and it shows 1,5 as it should. Am I doing it wrong or is it the power supply? What component should I check? Quote Link to comment Share on other sites More sharing options...
SS_Dave Posted January 4 Report Share Posted January 4 On 1/3/2025 at 1:18 AM, JIIE said: Hi. Finally got some time to try this. I have full power on the two first pins. I switch my multimeter to DC, setting 20. There are no reading either on red/black, yellow/black. I checked a random battery and it shows 1,5 as it should. Am I doing it wrong or is it the power supply? What component should I check? What 2 pins are you talking about? The red and yellow wires at the HDD connector will not have power unless the Xbox is running.. The Xbox power supply need a PowOK from the main board within about 1 or 2 seconds of having the mains power connected other wise it will not supply a standby 5 volt for the mother board to allow to to send a PowON to the power supply. Also if the gold cap that's next to the 40pin IDE connector has failed the Xbox MB will not send a PowOK or PowON to the supply The 2 Capacitors that are next to the 20 pin power connector are bulging and could also cause the Xbox to not send the PowOK to the supply I would start the the 2 caps next to the 20 pin connector.. Cheers SS Dave Soft modding is like masturbating, It gets the job done but it's nothing like the real thing. Quote Link to comment Share on other sites More sharing options...
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