Dell PowerEdge R730 will not power on

Hi,

The LED indicator has 2 diagnostics indications on it. 1 of it would be one of the hardware components connection or cable connection is not properly seated on the motherboard. The one other would be indicating that the motherboard is faulty where it can't receive enough power or circuit is burnt. Try minimum components configurations and try turning on the server, also check all the cable connections are properly seated. 

Thank you for the response.

unfortunately it did not work.

Hello Jose,

I am sorry to see that. If you have it down to the minimum to post components and have removed everything else including backplane, controller, pcie cards, network daughter card… then you may be looking at a failed system board.

Your diag LED's indicate:

One of the Aux power rails has failed

These are used early in the startup process (states S1 - S5) so this is likely to be a failed plug-in component or motherboard

Try this test to rule out control panel:

In minimum to post configuration disconnect control panel from system board. Keep the lid off of the server. Hold in the iDRAC button on the rear for 15 seconds.

i have same issue are you solve it

Nope unable to solve. I salvaged what i could and scrapped.

Hi BladeMacho,

with all previous recomended steps you should be abe to solve this failure or findout which component causes the problem.

Did you have any further question?

Regards Martin

try to check if you can short the power button directly to the board.

@BladeMacho​ I just had the same problem, i found that  the front panel was the culprit, i just removed the connection to it from the motherboard and it solved the problem.

To anyone who comes across this post in the future:

It's a motherboard hardware issue.

TL;DR: You may fix it by finding what exact part is failing and replace it, but replacing the whole MB is simply easier and causes less trouble.

The diagnostic LED pattern B-0-0-1-0-0-B indicates there's a problem with auxiliary power rail voltage regulators and the system is forced into a "failsafe" mode, by actively turning all aux. voltage regulators off. (please refer to the self help section of server troubleshooting guide for interpreting the diagnostic LED patterns)

Generally, after the system connects to AC power, before waiting for power on signal from power button, a series of voltage check is performed. Since the MB only receives 12V from power supply, it needs a lot of voltage regulators to generate all the different levels of voltage rails for all these chips to work. And it needs all of them to be ready before attempting to start up. This starts with 3.3V standby power, which is definitely required by the Altera MAX Ⅱ chip, then 1.5V for iDRAC controller, and so on. When any of these checks fail, or the power good signal from the regulator chip failing to reach logic high within a specific amount of time, the system protects and get trapped in failsafe mode.

Just had this issue, except none of the lights will power on as the power button isn't working. Any way I can test the backplane (because that's where the power button connects) before I order a new mobo?

Hi,

I don't think there is any way of testing the backplane. Best to try remove and reinstall the cables, which might be loose. If the mainboard is not showing any life of LED lights, this might be the mainboard issue.