head unit not powering up - diyAudio
Go Back   Home > Forums > General Interest > Car Audio

Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Reply
 
Thread Tools Search this Thread
Old 13th June 2008, 03:41 PM   #1
zinc is offline zinc  United Kingdom
diyAudio Member
 
Join Date: Jun 2008
Default head unit not powering up

I have a Daweoo Matiz and have a Sony head unit that lays songs and stuff.
Normally when you turn the engine on the head unit turns on and when you rurn the engine off the head unit turns off too

now whenever i start the car it doesn't turn on the display stays blank.
however once later when i was driving the car and then turned off the engine i heard these pips, these pips normally happen when the radio has been on and then when you turn the car off the pips sound, when i heard these pips i turned the car back on and the radio and stuff was working and the head unit was lit up.

when i turned the car off and later drove it again the adio wouldnt come on and there was no lights or display.

there is power coming to it though because when i remove the head unit to access the cd slot when i press the eject button the cd ejects.

what shall i do?
thanks and please keep it simple as im not too knowledgeable about this stuff.
  Reply With Quote
Old 13th June 2008, 09:38 PM   #2
jol50 is offline jol50  United States
diyAudio Member
 
Join Date: Nov 2007
It could be the switched (ignition) power has a short and the constant (memory) power wire is ok. You need to pull or get behind the HU and look for usually a red and yellow wire and check their connections. They might be labeled or the switched will have a larger fuse/diameter wire and is often red but some are not. Those two power wires might have fuse holders in them, or they could be in the back of HU. Check the fuses/holders also, try to do it with key and HU on and see where the fault is. Also check the black ground wire for good connection.
  Reply With Quote
Old 14th June 2008, 04:03 PM   #3
zinc is offline zinc  United Kingdom
diyAudio Member
 
Join Date: Jun 2008
thanks for your help, but how do i remove the head unit i can remove the fancy bit with the display and buttons but how can i remove the box behind it?
thanks.
  Reply With Quote
Old 14th June 2008, 06:14 PM   #4
jol50 is offline jol50  United States
diyAudio Member
 
Join Date: Nov 2007
Most have a can that goes in the dash, then the HU slides into it. Look on each side for a tab or catch, maybe a slot to put something in to release it. It will work real easy once you do it right, so don't force anything. Release both sides and the HU slides right out, be careful of wiring that pulls out with it. You may have to remove a thin trim around the HU that covers the edge of the metal can. Just look at it real close on each side and you should see it. I assume you mean you can remove the face of the HU? The release will be just outside of that and the whole thing comes out. Each HU has different way of doing it and I don't have a sony here.
  Reply With Quote
Old 14th June 2008, 11:35 PM   #5
diyAudio Member
 
Join Date: Mar 2007
What is the model number of the Sony Radio?
__________________
If it ain't broke Don't fix it
  Reply With Quote
Old 15th June 2008, 01:52 AM   #6
1duck is offline 1duck  United Kingdom
diyAudio Member
 
Join Date: May 2008
go to halfords get the removal tool for that brand its either off to be like two hook things or some thin piece of metal..then its childs play.
  Reply With Quote
Old 16th June 2008, 06:44 PM   #7
zinc is offline zinc  United Kingdom
diyAudio Member
 
Join Date: Jun 2008
the model number is cdx 5000r
  Reply With Quote
Old 16th June 2008, 09:18 PM   #8
ppia600 is offline ppia600  United States
diyAudio Member
 
Join Date: Jun 2007
Location: Louis y ana
+1 on the radio accessory power fuse (in the fuse box) being blown or having a loose connection. Sometimes the radio's fuses are shared with other components in the vehicle and blowing those fuses (cigarette lighter/accessory outlet) for example, can cause the deck to not power up.
__________________
Don't worry... you can always turn the gain down!
  Reply With Quote
Old 19th June 2008, 07:55 PM   #9
zinc is offline zinc  United Kingdom
diyAudio Member
 
Join Date: Jun 2008
I checked and changed the fuses still othing so i don't think its the fuses.

When i put the key in at the start and turn it a bit it starts working but as soon as i turn the key some more to start the engine the radio turns off.

i still cannot get the head unit out i looked at the manual and it sead you have to get a thin flat screwdriver insert it on one of the sides then push in the clips, then pull it out.

I have put the screwdriver in and i have pushed in the clips but i cannot seem to pull it out.

can anybody point me to some videos, i've looked at some on youtube but there stereos are different types.

Thanks.
  Reply With Quote
Old 19th June 2008, 08:09 PM   #10
jol50 is offline jol50  United States
diyAudio Member
 
Join Date: Nov 2007
It may have a strap on the back to hold it up, you would have to get under dash and disconnect it. Still often the HU will slide out a little, it might be hard to get a hold of it without pushing it out from the back. The clips can be a touch/feel kind of thing, meaning once they release the HU slides out easily but will not budge until then. Often you do one side and it will come out just a little bit, then the other side you have to do without letting the first side lock back in. Can you get a photo of it?
  Reply With Quote

Reply


Hide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Powering a car stereo head unit at home! harmi11 Car Audio 14 5th January 2010 12:30 AM
Head unit greg928gts Car Audio 9 10th June 2009 06:26 PM
head unit basenjifan Swap Meet 0 24th September 2007 06:58 PM
Head Unit VoLCoM Car Audio 4 31st October 2005 02:51 PM


New To Site? Need Help?

All times are GMT. The time now is 11:36 AM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Copyright 1999-2014 diyAudio

Content Relevant URLs by vBSEO 3.3.2