Flashing screen on iBook

[mlwright]

Hello:

I have a graphite 466 MHz iBook that occasionally has a flashing screen, where the screen will go white momentarily, and repeat this several times for a few minutes, then may not have this happen again for hours.

Already zapped P-RAM, reset power manager, rebuilt desktop, started up with extensions off (still does it using only base extensions). No new software or hardware has been added to the system since this started happening.

The symptom occurs regardless of whether on the battery or AC outlet. Doesn't seem to matter which applications are open, or whether the applications that are open require much memory. Memory allocations have been changed to see if that has any positive effect, but no.

Thanks in advance for any help.

Merrick

 

[macgeneral]

Merrick,

I don't want to jump to any conclussions here but it seems you've done everything other that resetting the open firmware. My suspicion is that you may have a bad video card or perhaps it's not fully seated.

Any other disply issues along with this?
Have you performed a clean install?

You want the proceedure for resetting the open firmware?

e-mail me <techsupport@hds.pvt.k12.fl.us>

Macgeneral

 

[mlwright]

Yes, I was concerned that it may be a hardware matter, and will check the connection first.

No other display issues, and haven't performed clean install yet.

Also, yes, may I get the procedure for resetting open firmware for the iBook.

Thank you for your help.

Merrick

 

[macgeneral]

Boot into Open Firmware this way:

iBook powered &quot;off&quot;.
Press the power button and hold down Apple-Option-O-F keys until you get to the gray open firmware screen.

Type the following (case sensitive I believe)

&quot;reset-NVRAM&quot; <return>
&quot;reset-all&quot; <return>

(no quotation marks)

and you should boot up from there.

MacGeneral