The RCA DHG535 EMTA Cable Modem Review

After using this modem for a few years I've found it to be one of the better ones that I've used by my cable company. There is only one problem that I find quite cheap about it from the manufacture. That problem is that it tend to run very hot and has very few vent holes or any heat sink/fan to speak of.

From Left : Power, 2 Telephone Jacks, 1 Ethernet jack, 1 USB port, Cable In.

In the photo's above you can see there are hardly any vent holes to let out the oven like temperatures that quickly builds up inside.

Too my surprise with the high temperatures, this modem didn't have any connection drops or random reboots you would expect from an overheating condition.

But as you can tell you can’t have a high temperature inside any electronic device without some signs of stress as you can see in the photos below.

Front with cover removed.

Close up of the Broadcom chip and circuit board.

Power supply board with signs of heat stress.

In the photo's above you get a better idea of how cramped and tight it is inside and with very few places for heat to get out the modem has been slowly cooking it's self over the years and signs of a capacitor failure is showing.

these 3 capacitors are bulging and the one in the back left has started to leak on top.

 

Surprisingly the modem still works with no problems though I'm sure it's on borrowed time with the 3 caps looking like this.

When they fail it may just go out in a puff of smoke or a bang they are kind of unpredictable when they are in an unstable state. So in my attempt to get more life out of the modem I've removed the cover and left it off so the heat can escape. My internet speed has improved slightly and voice calls are more clear and understandable.