Question about Yamaha YAS-70 Front Surround System Black Theater System

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Possible Short When powered on the device cycles up and then turns off. Can not maintain on. Checked manual and tried standby with 30 second unplug as well as reseating all cables. No luck. Thanks.

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This is called the "protect mode" and it does this to keep the unit from more damage, meaning that the unit has some type of damage now and if it were to remain on it will cause more damage.

Most of the time this will happen because of a bad channel in the amp circuit. On more rare occasions it is the power supply causing it. The only way to fix this problem is to repair whatever damage has been done to it.

It will take the proper tools and some electronic troubleshooting skills to fix it. If you have a multimeter and soldering equipment I can help you with this and tell you the most common places to check for problems, but it will require some minimal skills on your part like being able to identify certain parts and be able to pay very close attention to details, and understanding certain electronic terms. If you would like to try this yourself let me know, otherwise, you should take it in to a service center and let a professional check it for you. You can get an estimate first before deciding if it is worth fixing.

Dave

Posted on Nov 09, 2008

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6ya6ya
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Subject

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Symptoms / Customer Description
The symptom may occur while the TV is ON or in Standby.

1) If the problem occurs while the TV is in Standby:
The TV will not turn on via the remote or power button located on the set however after AC reset (i.e. unplug the TV for at least 30 seconds from the AC source) the TV returns to normal operation.

2) If the problem occurs while the TV is in use:
You may lose the ability to power off the TV or switch the video inputs however channel changing, adjusting volume, or accessing the menu may still be possible. After AC reset (i.e. unplug the TV for at least 30 seconds from the AC source) the TV returns to normal operation.

Sony has designed the BRAVIA Televisions to be CUSTOMER Software Upgradeable and therefore Sony will not pay a service claim on any issue resolved by a software upgrade. If a customer requests an update please refer them to the following website: http://www.updatemytv.com. If the unit requires the update, you may enter the customer's information in the website and a USB device will be sent to their address.
If a customer does not have access to the web please have them call the Sony Call Center Support line: 1-866-210-6333

If a customer reports either symptom above request that they unplug the set from the AC wall outlet for at least 30 seconds and then plug the set back in. This will reset the TV and it should work fine for several months. If resetting the TV does not resolve the issue the customer has a different problem and a service call by a technician may be required

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