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Re: about my garmin nuvi 660
Make sure you don't have the sound muted. Have you tried plugging in a set of headphones into the headphone jack? If you can hear sound with the headphones, most likely, the internal speakers have failed. If you still can't hear any sound, the audio output stage on the motherboard has failed. In either case, you will need to send the unit back for repair. Be sure to have your serial number handy. Register it online https://my.garmin.com/mygarmin/marketing/register.htm
if you haven't already done so.
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Yes, follow this sequence:
1. Turn the device on
2. Press the call (phone icon) and the volume up (+) button at the same time and keep them pressed. After a few seconds the speaker will shut down.
3. Release the buttons.
4. Turn the speaker back on. It will automatically enter into search mode... And there you are, memory wiped up.
A bit hard to diagnose from here... a lot of variables.
Is your iOS Up to date 8.1.3
Settings / General / About...
Next... quit all your Apps in Memory on your iPhone 4.
Then shut down...
D/Clik round button drag all small windows up to quit
Hold Round & Top Button down together for about 10 seconds
it will shut down
Press top 5 sec to restart.
Check bluetooth problem.
If still there ask someone in the genius bar at Apple store.
they have diagnostic utilities to assist..
First step would be to Reset Your Mac's SMC The method for resetting your Mac's SMC depends on the type of Mac you have. All SMC reset instructions require shutting down your Mac first. If your Mac fails to shut down, try pressing and holding the power button until the Mac shuts down, which usually takes 10 seconds or so.
Mac portables with user-removable batteries (MacBook and most MacBook Pros):
1.Shut down your Mac. 2.Disconnect your Mac portable from its MagSafe connector. 3.Remove the battery. 4.Press and hold the power button for at least 5 seconds. 5.Release the power button. 6.Re-install the battery. 7.Reconnect the MagSafe connector. 8.Turn your Mac on. Mac portables with non-user-removable batteries (MacBook Air and some late 2009 MacBook Pro models):
1.Shut down your Mac. 2.Connect the MagSafe power adapter to your Mac and to a power outlet. 3.On the built-in keyboard (this will not work from an external keyboard), simultaneously press and hold the left shift, control, and option keys while you press the power button. Release all keys at the same time. 4.Press the power button to start your Mac.
Mac desktops (Mac Pro, iMac, Mac mini):
1.Shut down your Mac. 2.Unplug your Mac's power cord. 3.Press and hold the Mac's power button for 15 seconds. 4.Release the power button. 5.Reconnect your Mac's power cord. 6.Wait five seconds. 7.Start your Mac by pressing the power button.
Alternative SMC reset for Mac Pro:
If you have a Mac Pro that isn't responding to the normal SMC reset as described above, you can force a manual SMC reset by using the SMC reset button located on the Mac Pro's motherboard.
1.Shut down your Mac. 2.Unplug the Mac's power cord. 3.Open the Mac Pro's side access panel. 4.Just below the Drive 4 sled and adjacent to the top PCI-e slot is a small button labeled SMC. Press and hold this button for 10 seconds. 5.Close the Mac Pro's side door. 6.Reconnect your Mac's power cord. 7.Wait five seconds. 8.Start your Mac by pressing the power button. Now that you have reset the SMC on your Mac, it should be back to operating as you expect. If the SMC reset didn't fix your problems, you can try combining it with a PRAM reset. Although the PRAM works differently than the SMC, it can, depending on your Mac model, store a few bits of information that the SMC uses.
First disconnect all speakers from the unit and then try turning the unit on too see if it still goes to protect mode. Protect mode is a shut down feature that shuts down the unit because of a shorted speaker or speaker wires are touching each other. If the unit does not shut down after disconnecting all speakers then reconnect them one at a time while turing the unit on after each conncection until you find the shorted speaker. If it shuts down with no speakers attached to it then you have a internal problem with the amplifier section, probably a shorted output transistor in the Amp circuit or preamp circuit.
It is an indication that you have a faulty output I.C. which automatically shuts off the unit to avoid further damaged.Like what you have said before you experienced that already when the speaker wire touched and then the unit shuts off in order to protect your output I.C. from damaged.
But the senario now is reversed.It shuts off to protect your speaker from damaged because your output I.C. was shorted.
I've advised you to look for a qualified technician to isolate the problem because it is quite technical.
Replacing the output I.C. and some resoldering for some dry joints on the board will cure the problem.
Take every single cable out of the unit, now power on the unit.
If the power protection still shows then there is an internal fault, usually a short or a component defect.
If it powers on ok, switch off and insert 1 speaker at a time and power on the unit until the protection mode comes on again, the last speaker you have put in has overloaded it for some reason, also as you are trying each speaker use the volume and bass controls to see if there is an internal overload.
Thats as much as I can offer you until you narrow the fault down to the unit or one of the speakers.
Disconnect speakers one by one and reset the unit each time. If the speaker is blown, or the wires are frayed, it will shut down the internal amp. Also check the fuse in the back of the radio first, it should be near the wire harness. Power cycle the unit as well, unplug it from the power source, plug it back in. Hope this helps.