PwermG5 on/off icon flashes 3 times; short short long

What shd I do....on/off icon flashes 3 times; short short long??

Can you count the beeps or flashes?
1 beep = no RAM installed
2 beeps = incompatible RAM types
3 beeps = no good banks
4 beeps = no good boot images in the boot ROM (and/or bad sys config block)
5 beeps = processor is not usable
In addition to the beeps, on some computers the power LED will flash a corresponding number of times plus one. The LED will repeat the sequence after approximately a 5-second pause. The tones are only played once.
Note: In this case, a flash is considered to be 1/4 second or 250 ms or greater in length.
If you're sure the RAM is good, try the Hair Dryer trick...

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    It may not be a good soloution for a novice, but I have been using hosts files to block unwanted URLs for many years with zero disasters and lots of positive results.
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    Hi vaziranimk, 
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    From EZ Jim's link, there was another link to this info at the Apple site, re. Power on Self-Tests:
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  • Hone turned off . i tried several times to turn it on but i doesnt work even by using the power and the home button. what should i do ?

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    Hi vanessato,
    Thanks for visiting Apple Support Communities.
    I recommend these troubleshooting steps if your iPhone does not turn on.
    iPhone: Hardware troubleshooting
    Will not turn on, will not turn on unless connected to power, or unexpected power off
    Verify that the Sleep/Wake button functions. If it does not function, inspect it for signs of damage. If the button is damaged or is not functioning when pressed, seek service.
    Check if a Liquid Contact Indicator (LCI) is activated or there are signs of corrosion. Learn about LCIs and corrosion.
    Connect the iPhone to the iPhone's USB power adapter and let it charge for at least ten minutes.
    After at least 30 minutes, if:
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    The low-battery image appears, even after the phone has charged for at least 20 minutes: See "iPhone displays the low-battery image and is unresponsive" symptom in this article.
    Something other than the Home screen or Low Battery image appears, continue with this article for further troubleshooting steps.
    If the iPhone did not turn on, reset it while connected to the iPhone USB power adapter.
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    If the display remains black, go to next step.
    Connect the iPhone to a computer and open iTunes. If iTunes recognizes the iPhone and indicates that it is in recovery mode, attempt to restore the iPhone. If the iPhone doesn't appear in iTunes or if you have difficulties in restoring the iPhone, see this article for further assistance.
    If restoring the iPhone resolved the issue, go to step 4. If restoring the iPhone did not solve the issue, seek service.

  • TS2771 ipod touch not turning on, apple icon flashes only

    ipod touch not turning on, apple icon flashes only

    - iOS: Not responding or does not turn on
    - Also try DFU mode after try recovery mode
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    - If not successful and you can't fully turn the iOS device fully off, let the battery fully drain. After charging for an least an hour try the above again.
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    Apple Retail Store - Genius Bar       

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