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G3 won't power up

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glcpark

IS-IT--Management
Oct 17, 2005
18
US
I have a Definity G3 that I believe is a V6. It became unresponsive and acts like it doesn't have any power. No lights, no sounds, nothing. It is powered from a APC UPS, so I doubt it was a power problem. I have tried the power switch on the back of the cabinet with no luck. Anyone have suggestions on what to try to bring this thing back to life?
 
check the UPS, might be off, or the batteries are dead. Try the bypass if it has one. Might be a good idea to get your meter out and start checking the input voltages
 
Checked the UPS, tried an outlet on the wall that was powering another piece of equipment, even tried switching power cords. No luck.
 
get your meter out and check the input at the back of the switch, just turn off the breakers first.
if you have proper power there then you have something holding down your system, check for other breakers that may be off or the lights on the P/S's and see if one of those is off.
if you have not voltage at the input, check the output of the UPS,
 
You can also use your meter to check the fuses. Pull them out and check continuity. If you get nothing through one end to the other replace it with a new one.

"You don't stop playing because you get old. You get old because you stopped playing."


 
I had one once that seemed to have no power. I had to pull out all cards execpt the common controls. Hit the power switch and it was fine. Reinserted the other cards 1 at a time until 1 card shut down the system tripping the breaker on the back. Repulled the 1 card and saw it was fried. Long story short, 1 bad card really can take down a cabinet.

-CL
 
Pulling the boards sounds like a good idea, I'll try that next time I'm at the site. I am not sure that will be the fix because the breaker isn't tripping.
 
a bad board can cause this, normally in a training class, never seen it on a live system, though I have seen cards cause reboots and other strange things,
as far as this system, my gut says you are not getting input power, could also be fuses blown or a bad P/S
 
Don't pull the cards all the way out, just enough and a little bit more so they don't connect to the back plane. Many of a back plane has been damaged by someone pulling the cards all the way out and then incerting them wrong and ruining the back plane. Also, if U pull the cards all the way out for some reason use a static strap and put them in a static protected box.

Da-vi'do Juan-is'imo
P.S. For the best response to a question, read FAQ222-2244. Also give the type & version of your voice mail & pbx & preview your post to make sure it is complete & understandable. Please answer all questions so that I may have the info to assist you. Leaving a post on how you fixed the problem will also be appreciated.
 
No resolution yet. Yesterday, I double checked the power, and try pulling cards and switching the system on. No luck. I am trying to locate a replacement power unit, we will see if that solves the problem.
 
Did you check the fuses?? I have had the fuses blow and not trip the breakers.

"You don't stop playing because you get old. You get old because you stopped playing."

For the best response to a question, read FAQ222-2244.


 
I'm not sure where the fuses would be. I pulled out the power unit, and didn't see any fuses anywhere. Is there somewhere else I should be looking? I am certain the power coming from the wall is fine.
 
Is this a G3R, G3I, SI or what. Let me know and I will send you a link on where to find them.

"You don't stop playing because you get old. You get old because you stopped playing."

For the best response to a question, read FAQ222-2244.


 

The above link (page 231) is to an oldie but goodie manuel. You might want to keep this one for future reference. It's not an easy one to find.

"You don't stop playing because you get old. You get old because you stopped playing."

For the best response to a question, read FAQ222-2244.
 
Replaced the power supply, and it works!

Thanks for all the pointers.
 
If U still have the power supply, open it up and see if there is anything(including too much dust) shorting it out. Also look for leaking capacitors( the big silver colored things)
Don't touch anything as some of those capacitors can keep a charge for days or more and can knock your socks off. Usually U can replace the capcitors fairly easily. Sometimes there are fuses inside that can be replaced.
 
I did take apart the failed unit and didn't see an obvious cause for the failure. I didn't find any fuses, although there were several components on one of the circuit boards that had some brown discoloration around them. I believe I have a found a supplier that stocks used power units for a fair price, so I won't worry about fixing the dead unit and keep a spare or two on hand.
 
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