I figured that since my power supply works fine, there must be a filtering issue and low and behold cap changes and oscillating problems are noted. I looked at his power supplies, both were missing cap C15, mine has Cap C15. It is located nearby the 4 pin 12V connector. Interesting.
M2-ATX CHANGE LOG
01/15/2006 Production release
01/15/2006 Firmware release 1.1 (from M1-ATX)
04/15/2006 Rotate 12V ATX connector (mechanical issues)
04/15/2006 Connect R33 pull-up to VLIN5 instead of VCC
09/15/2007 Firmware release 1.2: Timing changes for PS_ON, 5VSB ON-delay
05/17/2007 Firmware release 1.3: Fixed PWR_OK delay at shut down
06/23/2007 Change R24 to 46.3k (12.05V output), fixed 12 V rail over-shoot
08/10/2007 Removed C1, 5V rail fix
08/10/2007 New PCB UL number UL mark: E154554
08/10/2007 Introduced serial number sticker UEC07xxxx and higher
06/06/2008 Serial number UEC0819xxx and higher
06/06/2008 C41 (was 10nF) 15nF X7R 10% 3.3/5V startup timing fix (6-26V)
06/06/2008 C35 (was 10nF) 22nF X7R 10% 3.3/5V startup timing fix (6-26V)
06/06/2008 Put back C15, 0.1uF X7R 10% 3.3/5V startup timing fix (6-26V)
06/06/2008 Firmware 1.4: Shut down while ACPI is not fully up fix via 60 second AutoLatch feature
06/06/2008 Firmware 1.4: Officially introduce3 more timing schemes:
0001 10 minutess / 1 hour
1001 15 minutes / 2 hours
0101 1 hour / 1 hour 15 minutes
NOTE: These changes were availabe in firmware version 1.3 but never advertised to the public.
06/06/2008 Firmware 1.4: In P0 (dumb PSU mode) if ignition is used, can act as an UPS system.
(consult M2-ATX product page for more information)
06/18/2008 Extended availability for the next 5 years
06/26/2008 Serial number UEC0819xxx with silver mark or serial number higher than UEC0822xxx
06/26/2008 Changed C35 to 15nF
06/26/2008 Removed C15 in order to prevent rare cases in which 5V starts oscilalting at startup.
11/01/2009 Serial number UEC0850xxx and higher (m2-ATX, M2-ATX-HV)
11/01/2009 changed C15 to 0.1uF X7R 10%, revert to change made on 06/06/2008