Question about Arris SURFboard SB5120 Modem

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Modem will not power up. No lights go on. I wonder if the socket on the back of the modem for the power cord is broken. Or is there a switch that I do not see

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Try using a new cord also there is a switch for power on and off try pressing the standby button. here is a link in case to help you

http://broadband.motorola.com/consumers/products/sb5120/downloads/SB5120_Quick_Ref_Guide.pdf

Posted on Oct 02, 2010

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All lights flashing


Unless the electronics is broke you seem to be having a wiring related issue. Besides a loop then a short in cable or at a port.

Verify no apparent physical stress displayed on unit or cabling and the correct power supply.

One test for bad electronics is by removing all wires, then look for bent & touching conductors in any of the ports from a poorly crimped cord damaging the port. Try to straighten back into shape - 8 per jack or once the touched eliminated if meta fingers bent my not be able to use that port and check the cable ends for cause and don't use.
Without any cords return power. Only the power light should remain on after about 3 seconds. Any other light display says problem and after verifying correct power supply call it toast - it broken.
If only the power light is lit then connect the 8 conductor (4-pair) Ethernet cable from the cable or DSL modem. That port should light if that device is alive. Note: No telephone RJ-11 size 2 or 3 pair cords, if it fits in a telephone jack you got the wrong one and can damage a port physically. RJ-45s used in Ethernet
are noticeably larger.
Assuming no strangeness in the other lights with the cable/DSL modem connected add one cord at a time to the other ports. Stop and remove any that caused/causes the initially observed condition that is the problem leg; try a different cord and examine the problem cord for physical damage (cuts, tears, squashed blemished area, ends pulled such that conductor open, or two or more wires shorted on an end)
As to internet connection try with only link to Cable/DSL modem and one cable to a PC and then see if the PC is obtaining an IP address via DHCP filling in the interface settings. If Windows "ipconfig" if Mac OS/X or Linux "ifconfig eth0" at the command prompt in a terminal window. Ping the entry for gateway, if no lost packets the connection is sound PC through e-switch to modem. Enter as new problem with modem type and PC operating system if this is a problem after the wiring is straightened out.
When the switch is working correctly Power light is steady ON and Port lights are mostly ON but blink with traffic down that leg.
Does this help?

Aug 30, 2012 | Belkin F5D5131-5, 5-PORT 10/100 NETWORK...

Tip

How to create a Xbox live ID


<ol> <li><br /> <p>With your xbox turned off unplug the ethernet cable from the back of your Xbox.Next unplug the xbox 360 power cord from the back of the Xbox 360.<br /></li> <li> <p>Unplug ethernet cable<br /> <p> and power cord from the modem. Wait for about 1 minute and then plug ethernet cable back into the modem.Now you need to plug other end of the ethernet cable into the back of the Xbox 360.<br /></li> <li> <p>Plug the modem power cord back into your modem , wait for lights to light up on your modem (this can take up to a minute).The last step is to plug the Xbox power cord into the back of the Xbox, turn it on and you are ready to go<br /></li></ol>

on Dec 06, 2010 | Microsoft Xbox 360 Console

2 Answers

How to setup xbox live


Hello there

No problem, in just a few steps you too will be online and ready to go.

Ethernet Cable

With your Xbox 360 turned off unplug the ethernet cable from the back of your Xbox.

Xbox 360 Power Cord

Next unplug the Xbox 360 power cord from the back of the Xbox 360.

Unplug ethernet cable and power cord from the modem. Wait for about 1 minute and then plug ethernet cable back into the modem.

Now you need to plug other end of the ethernet cable into the back of the Xbox 360.

Plug the modem power cord back into your modem , wait for lights to light up on your modem (this can take up to a minute).

The last step is to plug the Xbox power cord into the back of the Xbox, turn it on and you are ready to go.

Oct 10, 2010 | Microsoft Xbox 360 Console

1 Answer

The only light that is blinking is the internet light and the modem cannot be turned off with the off switch.


To my understanding to reset this particular modem is to either
A) unplug the power cord / unscrew coaxil (cable wire)

or

B) If there is a battery light you need to remove battery from battery compartment.for 30-60sec and put it back in....

C) small pin hole on back of modem use a paperclip or sharp point and hold down for 10sec.

Apr 28, 2010 | RCA DCM425 DIGITAL CABLE MODEM (RCADCM425)

2 Answers

The on-off switch on Speedstream 5100 modem keeps turning itself off, every few hours for few days. Finally modem has no power, what could the problem be? already tried replacing the power cord but still...


1: unplug all the cords to the modem
2: press the reset button from the back of it
3: leave it for about 5 minutes to drain off the static charge
4: plug it only to power source to see if the power lights up
5: if does'nt don't waste your time on it, its bad and if it was provided to you by your internet service provider get it replaced for free.
6: if you bought it yourself check for warranty generally modems have lifetime warranty

Dec 12, 2009 | Efficient Networks SpeedStream 5100 Modem

1 Answer

When I plugged the power cord to the modem, all


no its the charger energy and the capacitor present inside the modem

the capacitor has a tendency to store little amount of energy so psease do not take tension it is normal

Dec 01, 2009 | 2wire (1000-000057-000) Modem

1 Answer

Ethernet won't reconise modem for xbox live


Once you have everything hooked up:
Ethernet cord going from modem into wireless router in port labelend internet or wan, and an ethernet cord going from the router to the xbox you should try these steps:

Unplug the power cord on the modem and plug it back in- once all the lights come back on
Unplug power cord on router and plug it back in-

Hope this helps.

Apr 07, 2009 | Linksys Wireless-G WRT54GS Router...

2 Answers

Arris cable modem


try shutting of your computer then shutting off the modem, the modems have batteries you might have to remove them theres usally a panel on the bottom, in the back you should have a wire for comcast cable and an ethernet chord telephone too if you have everything. also your modem could be broken, i had the same problem

Jun 06, 2008 | Arris Touchstone 450a (CM450) Modem

2 Answers

4100SS Power Button fails


I also had this problem with the 4100. This is what I did as a "Lo-Tech" fix. If you push in your power button and hold it in, and your modem powers on, then this should work for you. First unplug all cords. Turn the modem over and remove the small phillips screw from the bottom. Next, gently pry apart the two halves of the case. There are 4 tabs total. I found working back to front the best way. After removing the top half, gently pull the circuit board up and out. Now for the magic. Get yourself a twist-tie. Push the button all the way in, and wrap the twist tie around the whole button. Twist it down tight, and put everything back together. You should be good to go. If this doesn't work for you, or holding in the power button doesn't power up your modem, you could try just blobbing some solder over the three pins on the bottom of the board, under the switch. This should bypass the switch completely. Either way, you can cycle your power on and off with the cord instead of the button. Hope this helps!

Mar 01, 2008 | Siemens SpeedStream Modem (4100) (SS4100)

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