Originally Posted by team montecarlo
I have a 540080 series 2. A few months ago the guide failed to up date. I rebooted the unit and it went to guided setup. After running through guided setup it failed to connect, kept saying there was a problem with the adapter. I tested the adapter in the PC and it is good. Years back I upgraded the drive to 250 but it ended up going south so I replaced it with the origina. lI assumed it was either the hardrive finally going on me now or the USB chip went bad. We hardly ever use it so I never messed with it anymore. I finally got around to messing with it again. I ran a phone line to see if it will update over the phone. It was on grey screen when I turned the TV over to it. I rebooted it and it goes to Welcome for less than a minute then grey screen. I tried to kickstart for a drive test but it goes grey screen before the yellow light comes on so I am unable to get into kickstart mode. I am getting ready to prepare a drive to replace the original. Does it sound like the drive or possibly the board or power supply shot?
When it goes from the initial Welcome screen, which is built into the motherboard itself, to a featureless gray screen, that generally indicates some sort of incomplete or faulty communication between the hard drive and the motherboard.
Sometimes it's the drive's data and/or power cable needing to be reseated, sometimes, if you're running a SATA in an S1 or S2 it means you need to futz around with the adapter some, and sometimes it's a problem with either the drive itself or the software on the drive.
If it couldn't talk to the drive at all it would likely do what it does when there's no drive connected, just sit there on the Welcome screen and never move on, so with the gray screen it's moving on to the hard drive but not getting a video image (the just a few more moments screen) copied from the drive into video memory on the motherboard--video memory that just proved itself to be good by showing the first screen.
And of course whenever you get weird symptoms it may be the power supply that's really at fault and not what seems to be at fault at fault.
So, you need to check the data cable connections, you need to eyeball the power supply for bulged capacitors, and you need to use a voltmeter set to DC to check for +12V between the yellow wires and the black ones (or the metal TiVo chassis instead of the black wires, both are connected to each other and considered "ground"), for +5V between the red wires and ground.
You can do that by "backprobing" the hard drive power plug.
Don't let the metal probe tips touch during this operation.
Also, in addition to the white multi-conductor ribbon cable that connects the power supply to the motherboard, there's another one that connects the motherboard to the front panel.
Be sure not to accidentally dislodge or partially dislodge either of those while messing around inside there. They need to be fully seated in the sockets at a 90 degree angle whenever the power cord is plugged into the wall socket or whatever you're using to supply 120V AC.
Speaking of which, remember that the power supply is not shielded like a PC supply is and that there are high voltages present on exposed parts, and above all remember rule #1---
ALWAYS KNOW WHERE BOTH ENDS OF THE TIVO POWER CORD ARE AT ALL TIMES!