Xbox 360



''This page applies to the Phat (Xenon, Zephyr, Falcon, Jasper) and Slim (Trinity, Corona, Winchester) models. '' The Xbox 360 uses a grid layout system with letters and numbers to identify parts. For example, U4D1, the GPU, is an IC in section 4D. See the edges of the board for the sections, they are printed on.

No Power
Board is unresponsive to power button.

Undo Bad Writes/Check For Faulty NAND


 * Read NAND and check that the dump is valid
 * If you cannot get valid flash config, continue on below
 * Replace NAND if flashing a valid image does not yield a valid read

Standby Power Rails


 * Check power rails in the following order:

Standby Clock Signal


 * STBY_CLK is created by the ANA/HANA and is used to run the System Management Controller (8051 core) in the Southbridge. It is a 48 MHz clock signal.
 * Phat/Trinity:
 * Check STBY_CLK for 48 MHz single-ended clock:
 * Phat: FT2R2
 * Trinity: FT3N2
 * If bad/missing signal:
 * Check master crystal Y3B1 for 27 MHz single-ended clock.
 * Check STBY_CLK resistor for 33 ohms:
 * Xenon: R3B7
 * Zephyr, Falcon, Jasper: R4B24
 * Trinity: R3B15
 * Replace clockgen chip:
 * Xenon: Cypress CY28517 U3B4
 * Zephyr, Falcon, Jasper: HANA U4C2
 * Trinity: HANA U3B1


 * Corona/Winchester:
 * These boards do not have a STBY_CLK signal as the clockgen was integrated with the Southbridge (KSB). It is generated internally.
 * Check master crystal Y3B1 for 25 MHz single-ended clock.
 * This is as far as we can check on these boards.

Red Ring of Death
The Xbox 360 was plagued with problems during the first half of its life. Red Ring of Death also known as RRoD was an issue everyone has run into at some point. In order to diagnose the error of your console, when you see your Red Ring of Death or RRoD. You need to hold down the sync button and press eject 4 times. Each time you press eject you will be greeted with multiple quadrants that flash red (green on Slim consoles).

4 lights signify 0. 1 lights signify 1. 2 lights signify 2. 3 lights signify 3.

After pressing it 4 times, you will have a code that helps you diagnose your problem below. As example, seeing 4 lights flash 3 times then seeing 1 light flash means you have:

0001 ERROR_V_12P0 which means your solution is most likely to replace your power supply and to test and replace MOSFETs, caps, and controller chip on V_12P0 rail