This is for your information Only, no longer undertake Xbox repairs.

Explanation of the so called "ROD"-defect:
The cause for 90% of the hardware issues is that one of the solder balls under the GPU became loose or is even shorting out.

There are 3 main reasons for that:
1) Due to new E.U law Microsoft was forced to use lead free solder. A con of this solder is that it cracks more easily under the pressure it is taken under when the Xbox cools down after turning it off. That’s why the solder balls either loose contact (cold solder joint) or crack and shorten out with the others (bridged solder joints)...
2) The GPU is getting pretty hot (up to 90°C), the higher the temperature is the more time the solder balls have to crack...
3) The main cause is though that Microsoft uses so called X-Clamps to mount the heat sinks on the main board. Under these X-Clamps there is a little pin right in the centre under the chip that puts all the pressure on a tiny area which makes the main board flex because the main board under the centre of the chip is bushed up and the 4 corners are pulled down. This takes the solder balls under extreme stress and causes them to lose contact sooner or later(some are pulled away from the main board, others are heavily pressed into it).

The chances that the repair is successful are best if there haven’t been any attempts to fix it yet...
The fixes vary depending on the problem but in general I reflow(that’s how Microsoft fixes the Xboxes as well) before using other known fixes like the X-Clamp Fix which prolongs the duration of the fix.
Other repair services only replace the X-Clamps and so fix the 360 by flexing the main board in the other direction which will cause it to break sooner or later again.
This kind of repair usually lasts for an average of 3 months.
I reconnect the solder balls by reflowing them which gives them its old form back and I use a modified version of the X-Clamp replacement which doesn’t flex the main board. This is necessary for the solder balls to stay in a good condition.
Additionally I will replace the thermal compound which conducts the heat better than Microsoft’s thermal pads and reduces the core temps by around 4°C.

If the warranty-seal is not broken/ the console hasn’t been attempted to be repaired yet you are also getting a 1 month warranty on the repair if the Xbox should break within this time the next repair is free.