0002 error but intermittant

[dtrmad2004]

Hi peeps.

Got an Xenon board here with a strange 0002 error.

It was a 100% working MS refurb that I sent to a freind and when he got it he said it had red rings. got him to check error code and came up wiith 0002.

I was stumped as the board has never been repaired before and had very light use after being sent to me from MS.

I just got it back in the post today and upon inspection I can't see any obvious shorts or breaks, I took the heatsinks off and if I tilt the board slightly and press down on the heatsinks I can get it to boot for a few seconds before it throws a 2 red light error because the heatsinks arent touching properly.

When it does throw the 0002 i hear a small "tick" sound and I cant make out where it's coming from.

Any ideas?

[dc_away]

0002 is a cpu power issue i think. maybe a FET on its way out (may cause a ticking sound) or a solder point on the cpu may be failing (could also cause a ticking sound if it causes an arc).

[dtrmad2004]

Yes, i'm going to try and reflow it.

I fitted a bolt kit to it and got it to boot to dash ok but as soon as I move the board in anyway it reverts back to RROD 0002

[l_oliveira]

Have you checked the PSU connector too ? It could be damaged.

[techisgood148]

Could the "tilt switch" (forget what it's called, checks whether console is in horizontal or vertical position) cause this?
Will it boot reliably "standing up?"

[dtrmad2004]

Nah its not a faulty psu adaptor because i managed to recreate the fault and get it to boot when I hadnt touched the cable. it also does it if I knock it but not if i move it gently

I just reflowed it and its still the same.

Another thing I just found is if i press on the gpu heatsink in a certain place I hear a phhfft noise like capacators being shorted and discharged. I know that noise due to a console that I got with no washers on the rrod fix and the heatsinks were toching capacators. (not touching in this case)

I think im trying to fight two errors here and thats why it just doesnt seem consistant. just cannot understand how its gone from rock solid to this. I think the courier must have had a party with the box 

And no, its not the tilt switch

[l_oliveira]

It IS the PSU connector.

The sparks you're hearing are coming from the high current 12V rail AT THE POWER connector.

0002 happens when the Southbridge detects that the main chips didn't power up for any reason ranging from a faulty power supply to lack of 12V on the voltage regulator.

If you had an actual short circuit on the VCORE circuitry you would have shorted MOSFETS by now.

I am somehow experienced with repairs on the power block circuitry of the 360 main board.

[dtrmad2004]

I just did a video of it, to get it to working in the cage I had to do minute fine tuning of the screws or else it doesnt boot.

http://www.youtube.com/watch?v=axrkjm9Rp_Y as I pick it up and shock it it goes back to the rrod 0002, ive reflowed it twice now. I'm thinking maybe something has worked its way under the cpu or gpu?

Ok, just seen the alert for your reply l_olivera but it seems strange that its condition changes when I fiddle with the screws or give it a sharp shock. I will investigate the psu connector some more, thankyou for your time

[dtrmad2004]

I owe you a drink l_olivera, you are 100% right. I puled harder in the psu connector and now it has gone back to a constant 0002

Now to try and replace it from a junk machine.

Thankyou very much

[dtrmad2004]

Actually. Its not the power connector, its around the USB port area.

Watch http://www.youtube.com/watch?v=wcgjI4w1zOc

[Gazcoigne]

theres a few mofsets in thatarea that can cause 0002 errors if blown/dying check them and replace if necessary

[l_oliveira]

Actually. Its not the power connector, its around the USB port area.

Watch http://www.youtube.com/watch?v=wcgjI4w1zOc

You should then check the big inductors that are close to the  USB connector area.
There's a bunch of power related SMD parts you might want to check at the bottom of the board.

And no matter what do not reflow the big BGA chips as they have nothing to do with this issue.

I would like to stress that no matter how small it can be, a little tension on the motherboard could cause the power connector to touch or not the contacts on the PSU connector. I'd say you have a REAL close/detailed look on the connector as it could even be broken internally. Particularly if the unit has been exposed to a physical shock (I.E.: has been dropped)

Inspect it throughly. Also pay attention to the inductors (ferrite beads) on the motherboard.

[dtrmad2004]

Thanks, will have a check later on.

I see where you are coming from RE the power supply socket but the fault seems to happen more when I touch the usb area and not at all when I touch the power socket. The only reason it happened before was because I was holding onto the usb area at the same time I tried to move the plug

Ive checked the PSU with a multimeter while flexing the board a little bit and cannot find fault with PSU connector and I adjusted the positions of the metal tabs inside the socket