M2-ATX cold boot HDD detection problem

**bmassey96** · 07-03-2007, 01:56 PM

My M1-ATX is doing the same thing. All worked fine with the original PS in the Travla case.

**Snortonnorton** · 07-03-2007, 02:02 PM

I thought a lot of people successfully use the m2 atx.

I hope so, as I'm about to install one for the first time.

what is the most likely problem? incompatibility with the hard drive or motherboard? or something else?

**novorado** · 07-04-2007, 12:49 AM

I could not get it replaced unfortunately. Manufacturer just stopped responding to emails and disappeared. I guess I will end buying another one from local supplier.
Please understand that you are going to purchase half-cooked product which may or may not fully work, and you pretty much on your own.

**bmassey96** · 07-04-2007, 10:13 PM

I haven't taken the p.s. out and ran any tests yet, but is this most likely an issue with low 5v power at cold boot? I've seen other posts where a capacitor was replaced on an M1 or M2 (don't remember) power supply to one that was of a higher capacity to solve a different problem.

I really don't feel like dumping a $75 p.s., and then spending $90+ for a different brand. Grrrrrrrr....

**brodgar** · 07-05-2007, 05:21 AM

I have a slightly different problem. At present my unit is set up on the bench running through a mains transformer giving a constant 12.52 volt. It copies the car installation having a constant and a switched supply.
When I try to start, it powers up and off immediately. The screen and the power light on the case just flash once. It will then repeat the process at about three second intervals. Nothing else happens. It never starts.

**tom_rosenback** · 07-05-2007, 06:23 AM

I have got a Jetway (J7F2WE1G5D) motherboard, M2-ATX PSU, 512mb ram... I HAD the same problem as mentioned in the first post and got this solved by changing the HDD. The HDD that I use is a SATA disc and the one I changed out was also a SATA. So you could try changing HDD.

Hopefully you get this issue solved.

**bmassey96** · 07-11-2007, 06:50 AM

Either way, switching out HDD or P.S., I'm still losing the same $$$. If the original 80 watt power supply works just fine, then I don't think the problem is best solved by swapping HDD. First my P.S., then my touch screen, now my USB bluetooth....this project is going downhill quickly.

**bmassey96** · 07-11-2007, 05:43 PM

I just took some measurements from the M1-ATX and the Migrus power supply that came with the Travla case.

M1-ATX -> 11.77v on the 12v rail, and 5.0v on the 5v rail
Migrus 80 watt -> 12.22v on the 12v rail, and 5.3v on the 5v rail

The Migrus starts the HDD every time while the M1-ATX will only start the HDD after a warm-boot.

If all else is equal, it would seem that the HDD needs more than 11.77v to start up (in time).

Anyone else have measurements on their M1 or M2?

**bmassey96** · 07-11-2007, 06:13 PM

I think I got ahead of myself. It appears that it's the 5v current that is used for startup of a HDD. The drive is a Seagate Momentus, SATA 1.5, 80GB, and according to the data sheet needs 1.1amp max on the 5v for startup. Both power supplies say they can provide this, but I wonder if the M1 is, or if this particular HDD is just really picky.

**bmassey96** · 07-19-2007, 06:53 PM

Got my hands on another HDD, and this one boots up fine with the M1-ATX. Not sure why the other HDD won't cold boot, but I can live with the P.S. now.