iMac crashed but several hours later restarts what should I check ?

[liquorice]

This morning my imac refused to reboot past grey screen, but now has restarted, what do I need to check to find what went wrong ?

 

[liquorice]

seems to be working fine now apart from on restart it had to repair iPhoto library and spotlight indexed the iMac.
Should I keep my appointment at the Apple store ?

 

[macthefork]

You could try looking at the Console Logs to see if it listed any failure reports for the time you had a failure to boot. Console is in your Utilities Folder.

 

[liquorice]

And there you have, has just crashed to a blue screen like it did this morning don't know what it means but its not good, wish I hadn't delayed appointment till Wednesday, now screen went black and have a lot of vertical green lines on screen.

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Then it started up okay for a few minutes flashed to lots of green lines again, cleared so I can view my desktop but can't click or move anything

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I can now move my mouse pointer around bot can not click on anything, does this sound like a video card issue ?

 

[liquorice]

Well I'm pretty sure its a graphics card problem again !

 

[liquorice]

Well still not working

 

[liquorice]

Managed to get imac to do a apple hardware test, just for something to do, as taking it in tomorrow.

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Well that test came up with no hardware problems

 

[liquorice]

Pretty pleased that I found out I can access my imac hardrive from my daughters macpro using thunderbolt and save some stuff tat I hadn't backed up.

 

[liquorice]

So should I have tried the recovery option ?
Too late now as imac in box and appointment at 1 pm, be interesting to see what problem is this time.

 

[liquorice]

Imac gone for another graphics card change

Just to add the Apple Harware Test didn't pick up the fault

 

[liquorice]

Thought I would have it back by now, but they still haven't received the replacement graphics card at the apple store yet