Question about Technics SCEH790 CD Shelf System

5 Answers

Wont turn on

The standby red light is on my stereo but there is no display. now when i press the power button to turn it on a low pitched sound comes from the speakers for a second and then the stereo just goes back to standby. i have changed the fuse in the plug but this has had no effect. now i think the speaker wires were loose once when this problem started could this have shorted the system somehow if they touched each other or the system? if so can you think of a solution as i think the warranty is up . a reply would be much appreciated,thanks for your time.

Posted by on

5 Answers

Re: wont turn on

Hi had the same problem with a friend of mine stereo there should be some internal fuses maybe three or four by the transformer. check all three with a multi tester or hold them up to a light to see if they have a break in the wire they some times blow if the speaker wires touch just replace if blown and should be ok hope this helps.... good luck.

Posted on Jul 11, 2008

Re: wont turn on

I had same problem with my sterio it displayed F61 error and to be honest it was worth reapiring the total cost of repair was only £120 so for a quite expensive sterio i thought it was worth it

Posted on Aug 24, 2007

Re: wont turn on

Buy a nice used stereo but keep the speakers! they might come in handy dont forget to snip the 3.5 MM plug off if the new stereo hass binding posts or tab connectors

Posted on Feb 25, 2007

  • Level 1:

    An expert who has achieved level 1.

  • Contributor
  • 1 Answer
Re: wont turn on

You are right the problem is a power supply problem. If it shows F61 then it may be the amp, or the processor, in both cases its not worth the repair

Posted on Feb 22, 2007

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points


    An expert that got 10 achievements.


    An expert that got 5 achievements.


    An expert whose answer got voted for 500 times.

  • Master
  • 3,130 Answers
Re: wont turn on

Its too bad this is a solid state system and has no user replaceable parts inside unless you have some knowledge of printed circuit board repairs. It sounds as there may be a power supply problem or the output devices are bad and loading down the power supply. These days, most of these type of systems, do not pay to have them repaired, unless you want to of course. I have found most repairs with the labor are almost or exceed the cost of a new one. Hope this helps. Good Luck Ps Please dont forget to rate this thread

Posted on Oct 18, 2006

1 Suggested Answer

  • 43 Answers

SOURCE: technics seperates

I'm not familiar with the exact system you have but the simplest cause to this problem woulf be a sticky switch, since power is reaching the system for the stand by light to come on.

It is possible to test switches like this by opening up the stereo and touching an unbent paperclip across the two metal contacts that go into the switch. If it comes on then you know your switch is bad, however be warned that running electrical equipment with the casing off puts you at risk of receiving a shock if you touch the wrong part so I don't officially recommend this.

If the switch is faulty then you can either try cleaning it by spraying a contact cleaner such as IPA into it or just replace the part (though this will require soldering).

Otherwise, some stereo systems have an internal fuse that will blow to protect the circuit if you overload it so have a look for fuses on the circuit board.

Posted on Nov 27, 2007

Add Your Answer

0 characters

Uploading: 0%


Complete. Click "Add" to insert your video. Add


3 Points

Related Questions:

1 Answer

My Aiwa CX-NAJ80 system will not come off Standby.

Sorry but the control board is shot that's why there inexpensive to purchase they only last for 3 to 5 years

Mar 02, 2014 | Aiwa Audio Shelf Systems

1 Answer

My Panasonic sa-ak770 will not come out of standby mode

Check to make sure there are no shorts in the speaker wiring, if okay remove speaker wires from back, press power if it comes out of standby the wires or speakers are the problem, if there is no change the protection circuit is not functioning or the audio output ic's have a short.

Jun 09, 2012 | Panasonic Audio Shelf Systems

1 Answer

Mhc-rg222 red light blinks power button wont turn on unit

Check the back of the unit for speaker wire shorts, if everything looks fine suspect the output ic's in the stereo.

May 26, 2012 | Sony MHC-RG222 CD Shelf System

1 Answer

Panasonic sa ak220 wont turn on

The problem is in the audio output ic, it is loading the unit into shutdown. The only option is have the ic in the stereo replaced.

Mar 07, 2012 | Panasonic SC-AK220 CD Shelf System

2 Answers

Vivid mini hi fi wont turn on

when you plug it in it goes into stand by mode automatically, the LCD display will be lit and you can set the time but nothing else will function. you have to hit the on/standby button to turn it on.

Feb 04, 2012 | Audio Shelf Systems

1 Answer

I have a gpx hm3817dtblk shelf system and i was wondering if you can get the alarm to play a cd instead of the radio or if you can do either one and how? Or does it even have an alarm?

The manual:

Page 6>>>>

Setting the Clock
a. Press the STANDBY button until the unit is in standby mode.
When the unit is in standby mode, the STANDBY button will be red.
b. Press the CLK ADJ. button. The time will begin to blink.
c. Press the HOUR and MINUTE buttons to adjust the hour and minute.
d. Press the CLK ADJ. button to set the adjusted time.
Setting the Alarm
a. Press the STANDBY button until the unit is in standby mode.
When the unit is in standby mode, the STANDBY button will be red.
b. Press the ALARM SET button. The time will begin to blink.
c. Press the FUNCTION button to seleect CD, Radio, AUX, or Buzzer.
For Buzzer mode, the display will not show any indication.
d. Press the HOUR and MINUTE buttons to adjust the hour and minute.
e. Press the ALARM SET button to set the adjusted alarm time.
An alarm clock icon will appear on the LCD Display when the alarm is set.

Jan 03, 2011 | GPX HM3817DTBLK Shelf System

1 Answer

So I connected 8 speakers to this system and I might have blown it out. when i connect it the red standby light comes on. then when i press the power button the screen goes blank as if turning on but...

Audio output shorted out or blown fuses in power supply check all fuses if fuses are good your Audio out put transitors or I.C has been shorted out as a result of impedence over load in future dont connect speakers in parallel in those small Audio units.

Natureisland technician

Commonwealth of Dominica

Nov 06, 2010 | Sony CMT-HP7 CD Shelf System

2 Answers

Unit does not turn on or display time

do you mean a power surge, if so the surge may have overloaded the elctronics,=cooked ,so afraid is u/s

Jul 07, 2010 | Fisher SLIM-3010 Shelf System

2 Answers

I have a memorex stereo, turntable, 3 cd changer etc. The standby light comes on but no sound, it is only 2 yrs old..

Sometimes you have to unplug it for about 30 seconds, then when you plug it in press the power on button. If there is still no sound, check the speaker connections on the back they sometimes come loose.

Oct 17, 2009 | Electro Brand Nostalgic Stereo CD Music...

1 Answer

Sony LBT W5000

According to Page 46 of the LBT-W5000 Operating Instructions:
"The display stars flashing as soon as you plug in the power cord even though you haven't turned on the system (demonstration mode).
Press DISPLAY (for LBT-W5000 / W300 / XB700 / XB500) or DEMO (STANDBY) (for other models) while the system is off. If the system is in the Power Saving mode, press POWER SAVE / DEMO (STANDBY) (for LBT-W5000 / W300 / XB700 / XB500). The demonstration appears automatically the first time you plug in the power cord, or if there is a power outage lasting longer than half a day."
I tested this today, as my LBT-W5000 was in Demonstration Mode. It definitely works. The only catch is (at least on the W5000), and it's a minor one, you have to reset your clock afterwards.

May 29, 2009 | Sony LBT-W5000 Shelf System

Not finding what you are looking for?
Technics SCEH790 CD Shelf System Logo

714 people viewed this question

Ask a Question

Usually answered in minutes!

Top Technics Audio Shelf Systems Experts


Level 3 Expert

4518 Answers

The Knight
The Knight

Level 3 Expert

66604 Answers


Level 3 Expert

3287 Answers

Are you a Technics Audio Shelf System Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides