Benji hello Hi, Our 3com switch, model 3C17300 / 4226T switch, since a power failure not working. The LED 'Power/Self test' is stable with an orange color. None of the other lights are lit. I checked with the 3com support site and found nothing useful . in an EE search i could get some of the issues similar but didnt solve it. I tried the console connection but also not working. Anybody experieced this issue? any thoughts to share how to fix it?! This switch is hardly used but out of warranty. Thanks

Good Morning,
Sometimes an F5E1 will appear when the control board is faulty.. because it isn't properly driving the door latch circuit properly. If the door latch assembly is fully functional, we recommend sending in your oven control board to Fixyourboard.com for testing and/or repairs. Reach out to them at 512-355-1108 or [email protected] They also have replacement touchpads for this model oven if needed.

Hi! try to reinstall drivers to the NT computer maybe that will help you.

I don't know anything about these units, nor do I have time to source any docs for you, but maybe you can try connecting a PC directly to the port your patch panel is connecting the the switch from, you can at least see if that port is working.
My next and only other suggestion is to invest in a "LAN cable tester". In my area, you can find cheap ones for U$20.
The tester will allow you to check connectivity between any two ports, and allows you to test both patch links and individual CAT5/6 cables.
Good luck!

It can be bad fuse, shorted trnaistors inthe inverter circuits, bad caps, transformer. See the pictures here: http://s807.photobucket.com/albums/yy352/budm/Dell%20E173FPb/
Post back what you find so we can guide you further.

?????????? Need a specific question. Otherwise, power it and look for a power on led light. Plug in two or three computers on a small network and count one blinking light for each computer. Voila!

Hi,

This is the problem with power adopter. Please replace you adopter and let me know...

Rajeev

Probably a bad power supply. Is it getting through power on self test? Any LEDs illuminated when you power it on? Best way is to first connect a terminal configured at 9600,N,8,1 to the console port and then power it on. If you see it running through self test in a few (10-30) seconds, then it's starting up, watch the screen for any errors. If not, then your power supply is probably shot.

Hello,

My name is Vikram Kumar Thumu, from India-Hyderabad. I have seen your message on the issue related to Shutdown of UPS whenever there is a Power Surge. I would like to provide my suggestions on the issue. I hope that this should work for you and will resolve the issue.


I see that you are using


Generally, the issue happens if you are not using the UPS as per Manufacturer specifications or if it is overloaded frequently then UPS  shutdowns


To isolate the issue, I recommend you to check and go through below information.

If you see ON BATTERY a Yellow LED OR Flashing Yellow
LED with Audible Alarm (Beeping) then it means this condition for the On-Battery LED can indicate 1of 2 problems: They are:

1. The UPS is on battery backup and an intermittent audible alarm is on. The UPS will begin shutdown procedure.

2. Battery is low. The UPS will sta rt shut down. The buzzer sounds an audible alarm .


if you see a Solid Red on your UPS , then it means that UPS is either fault or overload.  It happens if there is a issue with UPS. The LED will be lit continuously and the unit will sound an audiable alarm for 10 seconds. Other cause could be with Battery is weak or Bad, the Battery needs to be replaced under this condition.

If you use a Flashing Red LED, then it means that battery is trying to give more power than it should. It happens then UPS is overloaded.

Let me tell you,,,,

Only data sensitive equipment such as a computer, monitor and external drive should be plugged into these outlets. Battery power is automatically

provided in case of a power outage. Power (AC or battery) is not supplied to these outlets when the UPS is switched off. (Do not plug surge protectors or power strips into the battery back up outlets).

 Most Important factor that effects the issue is that,
 

Caution: Never connect a laser printer or scanner to the backup outlets of UPS with other computer equipment. A laser printer or scanner draws significantly more power when in use than when idle. This may overload the UPS.

And caused the UPS to shutdown whenever there is Power Surge

To isolate the issue further, let me tell you the way where you can test the UPS if it is fine or not.

1. Charge the UPS for around 4 hours, and try below steps.

  

To Conduct a Self Test

 

Use the self-test to verify both the operation of the UPS and the condition of the battery. In normal utility power, push the On/Off/Test

button less than 2 seconds and the UPS performs a self-test function. During the self-test, the UPS operates in back-up mode.

Note! During the self-test, the UPS briefly operates on- battery backup power (the on-battery LED comes on). If the UPS passes

the self -test, it returns to on-line operation. If the UPS fails the self-test, it immediately returns to on-line operation and lights the replace battery LED. The loads are not affected. Recharge the battery overnight and perform the self- test again. If the replace battery LED is still on, the battery will need to replaced.

 

This should resolve the issue for you.

 

 If you need any further assistance on the issue, you can mail me at [email protected] . I'll be glad to help you.

 

Bye.
 

A blinking power LED means that the switch is either downloading software, or is initializing which also includes running the Power On Self Test. You may have firmware issues with the switch and/or the switch is stuck in initialization mode. You may have to contact 3com regarding a warranty issue. Hope this helps. Good luck.

when it flashes it usily means its connected if it dosent work at all you should get a new hub