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Why the unit has power but no display - Audio Players & Recorders

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Is it connected to the CPU or any thing else except for a power source :)

Posted on Feb 11, 2014

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Unit powers up but display is frozen and no nothing after that. No remote or button response except for display off.


The display microprocessor(computer within your unit) may be bad. This IC is responsible for processing any and all IR(infra red) commands from the remote, as well as scanning all the push buttons on the front of the unit. If you're interested in having your unit repair, please visit me website at audioserviceclinic.com. You may contact me there. Thank you.

Sep 04, 2015 | Pioneer X-smc3-s Music Tap Airplay Music...

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Onkyo tx-ds656 stand by power light comes on volume control knob rotates to max but display or unit wont start


Try factory reset: while holding the(CD) button on front panel,press (POWER) button.
After "Clear" is displayed the unit should be back to its factory default. :) If this dont work for you take the unit to be checked by service . :)

Jan 24, 2014 | Onkyo TX-DS656 Receiver

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Error code 1 and 3 on my Precor 9.21s treadmill?


Precor Error 01, Memory, RAM, EEPROM Test Error Probable Cause This error message almost always indicate an upper PCA problem when they are consistently displayed. Failures causing this error message to be displayed are rare.
Corrective Action If the error message is consistently displayed when the unit is powered up, the upper PCA should be replaced. It is possible to see this message displayed intermittently due to external causes. If the units A.C. input significantly dips during the power up test sequence the test could fail resulting in this message being displayed. Treadmills operating on non-dedicated A.C. circuits may see this message displayed on an intermittent basis. Precor Error Code 01

Precor Error 03, Memory, RAM, EEPROM Test Error Probable Cause This error message almost always indicates an upper PCA problem when it is consistently displayed. Failures causing this error message to be displayed are rare.
Corrective Action If the error message is consistently displayed when the unit is powered up, the upper PCA should be replaced. It is possible to see this message displayed intermittently due to external causes. If the units A.C. input significantly dips during the power up test sequence the test could fail resulting in this message being displayed. Treadmills operating on non-dedicated A.C. circuits may see this message displayed on an intermittent basis.
Precor Error Code 03 E03 EEPROM Test Error

Mar 27, 2013 | Precor 9.21s Treadmill Display Console...

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Unit will not turn off


Sounds as if the control board took a power surge.

Jul 24, 2017 | Amcor CF14000 Portable Air Conditioner

1 Answer

Display no longer works. Receiver still works, however. What's up?


This is purely a fault in the display unit. you need to check the power supply to the display unit. Check the filament voltage and the grid voltage to the display from the display driver processor.
If absent the power supply should be checked , it can be a open fusible resistor if voltage is absent. If not the IC is defective. Check for dry joints of the display unit, the IC or the connector to the display board.

Oct 03, 2010 | Sony STR-DE197 Receiver

1 Answer

LCD display is not working on the side by side fridge


Two faults can be thought of in such a case. First of all the LCD display itself could have failed and in this case all your functions will be working fine except the display. So if this is the case you will have to order for the display unit. Secondly if there is no power coming at all to the unit then you will have to check for failure of the power section from the base unit. You will need to open and ttrace the lines and if so replacement of the power/control unit is required, However a voltage test can only prove this correct. Hope you try this out Good day

Aug 03, 2010 | Westinghouse Refrigerators

1 Answer

Window unit will not power up


You need to check for voltage to the display. Just knowing the plug is working doesn't tell you that the electronics are getting power. It is possible that the power cord is bad. Once you have tested the unit and the unit is actually getting power to the display, then it's probably the control board in this unit.

Apr 11, 2009 | Frigidaire FAC107P1A Wall/Window Air...

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Base unit displaying E4 after we experienced a power black out


e4 error code that means it ihas defective base unit. it happened due to a spike in the power lines that may cause this error

Feb 09, 2009 | Uniden 5.8GHz Cordless Phone

1 Answer

Help


Hi,

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.

Cheers

May 13, 2008 | Samsung HT-X40 System

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