Netgear CM500 flashing red downstream

[MatheusB32323]

Hey so I like JUST purchased a Netgear Cable modem and I set it up by putting the coax in and ethernet out. I got power, then the downstream was flashing red, and I thought nothing of it. The ethernet light was doing what it normaly does too. I go to shower 10 minutes later to come back and see it's still doing that. I get antsy and take the power out, wait 1 minute, then put it back in. This time all the lights flash and like said in the manual, the online light was flashing indicating it was connecting. 30 seconds later it goes back to only downstream flashing red. What do I do?

[antinode]

> Hey so I like JUST purchased a Netgear Cable modem [...]

   Does that mean the same as "I JUST purchased a Netgear Cable modem"?

> [...] the downstream was flashing red, [...]

   "red" or amber?

> [...] like said in the manual, [...]

   Which "the manual"?

> [...] What do I do?

   I don't know.  _I_ would be tempted to contact my (unspecified) ISP,
and ask if I needed to register this thing with them.  I might also look
for "Troubleshoot" in the relevant User Manual, and seek advice there.
I'd probably also connect a computer to the thing, and point a web
browser at its management web site, to see if that had more to say than
one flashing LED could.

[FURRYe38]

Please post a copy and paste of the modems connection status page.
Have the ISP check the signal and line quality UP to the modem. Be sure the ISP provisions the modem correctly.
Be sure there are no coax cable line splitters in the between the modem and ISP service box. 
Be sure your using good quality RG6 coax cable up to the modem. 
Be sure to power OFF the modem for 1 minute them back ON.
https://community.netgear.com/t5/Cable-Modems-Routers/General-info-and-Troubleshooting-for-Cable-Mod...

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@MatheusB32323 wrote:

Hey so I like JUST purchased a Netgear Cable modem and I set it up by putting the coax in and ethernet out. I got power, then the downstream was flashing red, and I thought nothing of it. The ethernet light was doing what it normaly does too. I go to shower 10 minutes later to come back and see it's still doing that. I get antsy and take the power out, wait 1 minute, then put it back in. This time all the lights flash and like said in the manual, the online light was flashing indicating it was connecting. 30 seconds later it goes back to only downstream flashing red. What do I do?

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[MatheusB32323]

The connection is good, I used it for a cable tv box with MOCA and it worked. Also I have verizon fios, and yes I know fios is a fiber optic connection, but the cable that feeds the coax splitter that then goes to my room comes from the ONT for MOCA so you can watch youtube and such on your FIOS TV box. I am simply using the modem as a access point to put the ethernet in my PC for better response time and speeds since wifi is garbage

[MatheusB32323]

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@antinode wrote:

> [...] the downstream was flashing red, [...]

   "red" or amber?

Amber 

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@antinode wrote:

> [...] like said in the manual, [...]

   Which "the manual"?

The quick start guide

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   I don't know.  _I_ would be tempted to contact my (unspecified) ISP,
and ask if I needed to register this thing with them.  I might also look
for "Troubleshoot" in the relevant User Manual, and seek advice there.
I'd probably also connect a computer to the thing, and point a web
browser at its management web site, to see if that had more to say than
one flashing LED could.

---

I looked at the status and it said "in progress" and when i clicked on it, it then told me it failed and for me to check my RF connection. That was strange considering I had just swapped a cable tv box for the modem and the box worked just fine.

My ISP is verizon fios, and before you yell at me, yes I know Verizon is a fiber connection, but the way I am doing it is this:

When the fiber goes in it goes into the ONT, then the internet is sent through a CAT 5E cable to the router. There is also a coax out from the ONT which feeds a splitter which goes to my room and other parts of the house. The coax cable also is doing MOCA for the youtube and other internet apps on the fios cable tv boxes. So I figured since the coax up to my room is also doing MOCA, it should give internet to the modem. The reason why i do this is because I am 2 floors above my WiFi router and the connection here is terrible and I'm tired of it, and having some guy do a coax drop it too expensive.

[FURRYe38]

I would guess that the CM modem is getting a incorrect signal from the MOCA line and isn't compatible or getting a correct signal. the CM modem requires a specific signal for it to work right. 

[antinode]

> My ISP is verizon fios, and before you yell at me, yes I know Verizon
> is a fiber connection, but the way I am doing it is this: [...]

   Can I yell now?  THAT DOESN'T MATTER!

   The CM500 is a "Cable Modem", which means that it expects to deal
with a cable-TV ISP.  The fact that your non-cable-TV ISP uses the right
type of cable for some other purpose is insufficient; what's at the
other end of that cable is wrong (for a CM500).  "Cable-TV" and "MoCA"
are spelled differently for a reason.

> When the fiber goes in it goes into the ONT, [...]

   I know nothing about your (unspecified) "the ONT".  Perhaps with
another MoCA adapter, you might be able to wring a router connection out
of that "the coax up to my room", but a CM500 is a cable-TV modem, not a
MoCA adapter.

> [...] So I figured since the coax up to my room is also doing MOCA, it
> should give internet to the modem. [...]

   Figure again?  "Internet" is not a sufficient description of what's
sent through that cable.

> Screenshot (84).png

   "In Progress" is an (unrealistically) optimistic way to express, "I
see no recognizable signal here."  I predict that waiting won't help.