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Skutter
13-04-2018, 09:46 AM
So, just modded another TiVo, no front lights on the panel.

The lights on the Ethernet port light up, the fan and disc spin up, tv screen is blank (no splash screen at all).

I've checked the power supply volts with a multi meter and all appears ok.

I've had a good look at the chip holder soldering and it appears to be ok.

Any suggestions? I'm guessing I may have to remove the holder and try again.

Darren King
13-04-2018, 10:29 AM
Yes. If you are getting that result then it is not reading the PROM chip and the first thing to do is check your soldering work. You'll most likely find a pin that has not soldered to the board properly even if they all "look" like they are.

Islander
13-04-2018, 03:01 PM
I check for low resistance between PROM socket pins with a multimeter.
Apart from a couple of pins that a re 30-40k ohm the rest are in the megs. I have found the a couple with low resistance between the pins that clear by heating the affected pin and allowing the solder to flow.
I have had a non booting board that was caused by a solder splatter away from the PROM. A brush with a bristle paintbrush (not nylon) with the board upside down should clear these as they usually aren't well stuck on.

Skutter
16-04-2018, 03:32 PM
Thanks for the suggestions. I'll let you know how I go when I get time to look at it.