Losing power/signal and no internet connectivity for WRT54G2-RM

Just installed router and using Motorola SB5101 cable modem and Comcast.  Followed instructions  and the router has lost losing power and needing restarts a few times.  Have it installed by ethernet cable to my desktop, and using laptop (XP Pro Thinkpad P42).  Cannot get internet connectivity and also loses wireless signal connection.  I know there are a number of similar posted issues, and I am new to this forum.  Any ideas?

Download and upgrade your router's firmware, reset and then re-configure it...
Follow these steps to upgrade the firmware on the device : -
Open an Internet Explorer browser page on a computer hard wired to the router...
In the address bar type - 192.168.1.1...Leave the Username blank & in Password use admin in lower case...
Click on the 'Administration' tab- Then click on the 'Firmware Upgrade' sub tab- Here click on 'Browse' and browse the .bin firmware file and click on "Upgrade"...
Wait for few seconds until it shows that "Upgrade is successful"  After the firmware upgrade, click on "Reboot" and you will be returned back to the same page OR it will say "Page cannot be displayed".
Now reset your router :
Press and hold the reset button for 30 seconds...Release the reset button...Unplug the power cable from your router, wait for 30 seconds and re-connect the power cable...Now re-configure your router...
If your Internet Service Providor is Cable follow this link
If your Internet Service Providor is DSL follow this link

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