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Color Classic not powering on. Makes a chirping noise

Color Classic Macintosh no power

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#1 Outlander

Outlander
  • 6502

Posted 15 July 2017 - 08:43 PM

Hey there. I've got a Color Classic that no longer wants to turn on. When the switch is flicked, you can here it it energize or whatever you want to call it, then when you press the on button on the keyboard, it tries to turn on, then makes a chirping noise and shuts off. I've re-capped most of the board except the big capacitor(no one has one). Any ideas? Thanks

 

 

I think my mic on my phone is busted.



#2 HAL2001

HAL2001
  • 6502
  • LocationThe Netherlands

Posted 15 July 2017 - 09:10 PM

You are obviously suffering from Vertical Video Syndrome



#3 Nathan

Nathan
  • 6502
  • LocationUpstate NY, USA

Posted 16 July 2017 - 12:35 AM

I think my mic on my phone is busted.

 

 

Could be, I can't hear any "chirping" in the video, though.

 

Was the computer working prior to the current problem? If you know what the capacitor is rated and can do math and find the right parts you may be able to replace it with a group of smaller capacitors as long as they have an appropriate voltage rating etc.


PPC: iBook G4 14"/1.42Ghz [1.5 GB], PowerMac G4 800 DP QS [1.5 GB], Bondi iMac G3 333MHz (Upgraded Proc) [512 MB], Performa 6100/66 [136 MB]
68k: Macintosh LC II [12 MB], Macintosh LC III [36 MB] | Older: Apple IIe Enhanced [128 KB], Newton eMate 300 w/memory enh. [4 MB]


#4 Outlander

Outlander
  • 6502

Posted 16 July 2017 - 03:22 AM

I'll try and record the noise again tomorrow. Yes it was working many years ago before I put it in storage.



#5 bigmessowires

bigmessowires
  • 68000
  • LocationSan Francisco Bay Area, CA

Posted 16 July 2017 - 05:36 AM

There's something in one of Larry Pina's books about a "flupping noise" at startup. "If the set makes a flup, flup, flup noise when you switch on the power, it means something is drawing too much current." This is in reference to older models like the Mac Plus, so I'm not sure if it's still relevant for the Color Classic. The book describes a few different capacitor failures and shorted rectifiers that might cause this.


Edited by bigmessowires, 16 July 2017 - 05:37 AM.


#6 MarNo84

MarNo84
  • 6502
  • LocationRottenburg, Germany

Posted 16 July 2017 - 07:41 AM

Hi,
So you did recap nearly everything on the Analogueboard? What about the Mainboard itself? The usual suspects - 98% for my experience - are these SMD caps on the Mainboard; they start leaking. Visible an invisible. They cause that behavior too.

I did a recap of all of them - 9 in total? - and finally the CC starts and works like a charm without any disturbing backgroubd noise except the HDD ;-)

My Collection: www.marnoweb.de & www.classic-computer-collection.de & MarNoWeb @YT:  www.youtube.com/channel/UCyaeYrRq3IpohMUleaODrUw
I like: pre 1990 portable/luggable/compact & All-in-One Systems


#7 68krazy

68krazy
  • 6502
  • LocationNorthern California

Posted 16 July 2017 - 08:07 AM

Try sliding the logic board in and out while pressing the power button on the keyboard repeatedly.

Back when I had a CC, I accidentally shorted +12v and ground. After the short, I got the exact same symptoms that you have now—chirping analog board—until I did the sliding trick. That brought it back. I have no idea why that worked, but it did.

                                              68k: LC 550 fully restored, SE/30 fully restored                           PPC: PowerBook G3 Wallstreet PDQ

Owned in the past: Color Classic, Clamshell iBook, Rev. A Bondi Blue iMac, Slot Load 350mhz iMac, Power Mac 7100/80 and 7500/120, Performa 630CD, LC II, Performa 6116CD


#8 MarNo84

MarNo84
  • 6502
  • LocationRottenburg, Germany

Posted 16 July 2017 - 01:19 PM

Try sliding the logic board in and out while pressing the power button on the keyboard repeatedly.

Back when I had a CC, I accidentally shorted +12v and ground. After the short, I got the exact same symptoms that you have now—chirping analog board—until I did the sliding trick. That brought it back. I have no idea why that worked, but it did.

Yeah, in fact these tricks could help but on the other sider it's very risky... the board isn't designed for this kind of direct power input - it's like you put on a needle to a fast /aleady spinning or running vynil record. it may work but could cause damage to the system. I would go with the recapping of the SMDs - it's a neccessary job anyway - so give it a try, it's just a few more bucks (I spent about 8EUR on all parts) - I bet after recapping these, it will power up like a charm :-)


My Collection: www.marnoweb.de & www.classic-computer-collection.de & MarNoWeb @YT:  www.youtube.com/channel/UCyaeYrRq3IpohMUleaODrUw
I like: pre 1990 portable/luggable/compact & All-in-One Systems


#9 techknight

techknight
  • 68LC040

Posted 16 July 2017 - 06:44 PM

I dont hear anything? 


Main PC: Intel core I7 920, MSI x58 platinum, Radeon4850
PB: tibook G4, ibook G4, ibook g3x2, Lombard, 160, 165, 180, 180c Duo 2300x2, Duo 270c x2, 520cPPC, 3400c, 1400c
Desktop: G3AIO, SE, SE/30, 512k, plus, LCIII, iMac G4, iMac intel, 6400/225

#10 EvilCapitalist

EvilCapitalist
  • 6502
  • LocationNorthern Virginia

Posted 17 July 2017 - 12:37 PM

I had to crank my PC volume to max, then my stereo to max, then add a headphone amp and crank that to max and I just barely heard a faint chirp (I think you're right about your phone's mic not working right). 

 

Does the power light on the front also flick on and off as you're hearing the chirping?  I had a very similar sounding situation with one of my CCs after it was struck by lightening, and the analog board was toast even after having it recapped.  If you tried to power it on the machine would occasionally start and run without issue then just spontaneously shut down.  If I tried to power back on the power light on the front would turn on and off with a chirping sound coming from the analog board.


Own | SE Superdrive with AE TransWarp accelerator | Color Classic with Presto Plus accelerator | Color Classic II with Presto Plus accelerator | SE/30 | Classic with MicroMac Performer accelerator | LC | PM5200/75 | Twentieth Anniversary Macintosh with Crescendo G3/500MHz accelerator | G3 All-in-one with Encore G4/1GHz accelerator | iBook G3 | iBook G4 | iMac G3 | iMac G4 | G4 Cube 

Have owned | 512K | Plus | Classic II | Performa 575 | PM5260/100 | iMac G3 | iMac C2D | IIcx | LC | Quadra 700 | II | IIsi w/Portrait Display | Performa 400 | IIvx | Quadra 650 | PM6100/60 | PM7200/120 | PM7200/120 PC Compatible | PM7600/132 | Performa 6360 | Beige G3 | Quadra 840AV | PM8100/110 | PM8500/150 | PM8500/180 | PM6400 | PM6500 | PM9600/300 | PC PTP225 | B&W G3 | Graphite G4 | PB140 | PB165c | PB520c | PB540c | PB5300cs | PB190cs | PB1400cs/117 | Graphite iBook | Graphite iBook SE | MacBook C2D White | MacBook C2D Black Late 2013 MacBook Pro Retina 


#11 joethezombie

joethezombie
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Posted 17 July 2017 - 03:23 PM

Lol... found this video of EvilCapitalist trying to hear OP's audio:

Apple: ][+, //c, IIgs, Macintosh, SE, SE/30, IIfx, IIsi, Q700, Color Classic + //e, MacTV, 6100 DOS, 8100/110, ANS700/200, G3 AiO, G4 DP500, PowerBook G4
Commodore: 64C, 128D, Amiga 500, Amiga 3000


#12 EvilCapitalist

EvilCapitalist
  • 6502
  • LocationNorthern Virginia

Posted 17 July 2017 - 03:39 PM

That's great!  Perhaps that's what I was subconsciously thinking about when describing what I went through to try and hear the chirping sound. 

 

Sadly, I don't have a massive / cool setup like that, just a laptop in a dock going to a reasonable "executive" stereo system, and a portable Fiio headphone amp in my briefcase.


Own | SE Superdrive with AE TransWarp accelerator | Color Classic with Presto Plus accelerator | Color Classic II with Presto Plus accelerator | SE/30 | Classic with MicroMac Performer accelerator | LC | PM5200/75 | Twentieth Anniversary Macintosh with Crescendo G3/500MHz accelerator | G3 All-in-one with Encore G4/1GHz accelerator | iBook G3 | iBook G4 | iMac G3 | iMac G4 | G4 Cube 

Have owned | 512K | Plus | Classic II | Performa 575 | PM5260/100 | iMac G3 | iMac C2D | IIcx | LC | Quadra 700 | II | IIsi w/Portrait Display | Performa 400 | IIvx | Quadra 650 | PM6100/60 | PM7200/120 | PM7200/120 PC Compatible | PM7600/132 | Performa 6360 | Beige G3 | Quadra 840AV | PM8100/110 | PM8500/150 | PM8500/180 | PM6400 | PM6500 | PM9600/300 | PC PTP225 | B&W G3 | Graphite G4 | PB140 | PB165c | PB520c | PB540c | PB5300cs | PB190cs | PB1400cs/117 | Graphite iBook | Graphite iBook SE | MacBook C2D White | MacBook C2D Black Late 2013 MacBook Pro Retina 


#13 Outlander

Outlander
  • 6502

Posted 08 August 2017 - 07:38 PM

Lol, sorry guys, my other phones mic was trashed. This phones mic works better, but it's video quality is very poor. This is the chirping sound.  Also, yes I have re-capped the logicboard and analog board, but also have tried another  logicboard and it does the exact same thing. One of the only caps I could not find was that huge cap on the analog board. Mouser had me waiting for 6 months before I cancelled the order.

 



#14 EvilCapitalist

EvilCapitalist
  • 6502
  • LocationNorthern Virginia

Posted 08 August 2017 - 08:43 PM

That's the exact same sound that the analog board made in the Color Classic I had that was struck by lightning, except mine kept trying to power on so it was a continuous chirping.  Recapping didn't solve the issue and I ended up parting the machine out.


Own | SE Superdrive with AE TransWarp accelerator | Color Classic with Presto Plus accelerator | Color Classic II with Presto Plus accelerator | SE/30 | Classic with MicroMac Performer accelerator | LC | PM5200/75 | Twentieth Anniversary Macintosh with Crescendo G3/500MHz accelerator | G3 All-in-one with Encore G4/1GHz accelerator | iBook G3 | iBook G4 | iMac G3 | iMac G4 | G4 Cube 

Have owned | 512K | Plus | Classic II | Performa 575 | PM5260/100 | iMac G3 | iMac C2D | IIcx | LC | Quadra 700 | II | IIsi w/Portrait Display | Performa 400 | IIvx | Quadra 650 | PM6100/60 | PM7200/120 | PM7200/120 PC Compatible | PM7600/132 | Performa 6360 | Beige G3 | Quadra 840AV | PM8100/110 | PM8500/150 | PM8500/180 | PM6400 | PM6500 | PM9600/300 | PC PTP225 | B&W G3 | Graphite G4 | PB140 | PB165c | PB520c | PB540c | PB5300cs | PB190cs | PB1400cs/117 | Graphite iBook | Graphite iBook SE | MacBook C2D White | MacBook C2D Black Late 2013 MacBook Pro Retina 


#15 techknight

techknight
  • 68LC040

Posted 08 August 2017 - 10:07 PM

Ah... thats the classic "shorted rail on secondary" sound... 

 

Check the horizontal output transistor with a DMM on diode check for shorts. If its shorted, the flyback is toast. Thats test #1. Then you can work backwards from there like if there are any bad/shorted secondary rectifier diodes which CAN happen from time to time for various reasons. 


Main PC: Intel core I7 920, MSI x58 platinum, Radeon4850
PB: tibook G4, ibook G4, ibook g3x2, Lombard, 160, 165, 180, 180c Duo 2300x2, Duo 270c x2, 520cPPC, 3400c, 1400c
Desktop: G3AIO, SE, SE/30, 512k, plus, LCIII, iMac G4, iMac intel, 6400/225





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