Logic board replacement?

[galvinize]

(continuing saga from previous posts) The mid-2009 MacBook Pro which was exhibiting excessive "spinning beach ball" is now completely incapacitated. Took it to a recommended (private) Mac person, who tried replacing the HD and Memory sticks, to no avail. Suggested the logic board may be the problem. After his various efforts, the MacBook appears to be toast... I now get the grey screen with "do not enter" symbol on startup. Press the command + S keys on startup, and after a while, there are so many lines of overlapping white letters that the normally black screen practically looks white!
I can also see the messages: "cannot mount root error=19" and "hfs mount root failed: 6". Does this suggest a failed logic board? Or something else? I have been advised that it's not worth replacing the logic board, but I might try it, only if it's definitely the problem. Thanks in advance for any advice.

 

[badshoehabit]

Probably time for a new machine. It is eight years old and ancient in computer terms.

 

[IWT]

I totally agree with Sue.

I followed your other posts and this Mac has really been put through the ringer. It is of a vintage where, even Apple, might decline to repair it.

And even if they did, they would be repairing a botched earlier repair with goodness knows what additional collateral damage there might be.

And the cost.....wow.

Ian

 

[galvinize]

Thank you for your reply. I have a tendency to be impractical about keeping machines going past their expiration date, and the 24-step how-to for logic board replacement did not seem overly complex. But even I hesitate to replace a $350. item on speculation alone.