?
Solved

Power connector cable fried

Posted on 1999-10-22
18
Medium Priority
?
253 Views
Last Modified: 2010-04-29
I installed a Sony CRX120E CD-ReWritable. I turned the PC on and HOLY SMOKE, literally! The 2 cables very thin - black & red) that melted, are part of the connection from the DC Power Connector in back of the CD leading to the sound card. Now the monitor shows nothing when I start the PC. Am I in trouble or just...? <g>

Thanks for any advice in advance.
 
0
Comment
Question by:ehundrieser
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 10
  • 8
18 Comments
 

Author Comment

by:ehundrieser
ID: 2151346
Edited text of question.
0
 
LVL 4

Expert Comment

by:chewymon
ID: 2151427
Ouch!  I hope you didn't mistakenly connect the fine digital cable from the CD-R to the power.  From your description of the cable, it seems poassible.  The fine, two wire lead is usually a didgital cconnection from the CD to the motherboard.  The power is the thicker set with 3 or 4 wires and is the same as the connections to the HD.
0
 

Author Comment

by:ehundrieser
ID: 2152191
Thanks for your reply. Here's a clarification of my initial question.

The 2 thin (fine) wires that I described are actually part of the set of wires from the power supply [Y,B,B,b,R,r]. Capital letters represent wires that lead from power supply to DC Power Connector. Lower case letters represent the 2 BURNED wires that are part of that set and do not lead directly from the power supply - but but are present at the plug that enters the DC Power Connector of the CD writer.

On second thought, I believe those wires were not plugged into the sound board, but were tied around the power supply wires, to use for something else? Those are the 2 thin wires that melted!

Could I safely try to use the Emergency Startup Disk to restore the system?
0
[Video] Oticon Case Study

Open office environments can create the dynamics for innovation, but they also bring some challenges. With over 1,000 employees in an open office, Oticon needed a solution that would preserve the environment while mitigating disruptive background noises.

Watch how they did it.

 
LVL 4

Expert Comment

by:chewymon
ID: 2152232
Sounds like the miniplug set that is used for floppies.  Most power supplies have 2 or 3 sets of power wires tied together to use in different devices. Looks like you had a major short if they were not connected to anything.

To start with disconnect from the CD-R, check carefully and see if this whole set of wires has any bare spots showing and/or touching anything else.

If you are absolutely sure that no short exists, try rebooting without the CD-R.

You can try the emergency disk, but until you get something on the moniter during POST, it probably won't work.

Depending on your level of comfort in tearing down your system; I would dissconnect everything except the RAM, CPU, video, and HD.

If you get a POST screen, we can go from there.
0
 

Author Comment

by:ehundrieser
ID: 2152311
Thanks for the info.

The 2 thin wires [b,r] are definately damaged (melted plastic around the wires). Proceed with dismantling?

Erik
Los Angeles

0
 
LVL 4

Expert Comment

by:chewymon
ID: 2152440
Can you be sure that there is no short between the 2 wires?  If not, you have to solve that first.  If you have wiring experience you could cut them back to good wire and tape them off.  If you don't, you are probably looking at a shop job.
0
 

Author Comment

by:ehundrieser
ID: 2152877
chewyomon,

How would I identify that there's a short? The plastic on both thin wires is totally mangled/burned (20.5' in length) from beginning to end and the wires appear a bit shocked.<g>

The black wire sits in slot #3 of the DC power cable plug; the red wire in slot #4. At the opposite end is a small plug with 2 leads, that looking back at this fiasco, was plugged into the CD-W's 'Audio Out Ground Connector' in error.

It seems to me that I'd be able to remove the two wires and replace them with new ones?
0
 

Author Comment

by:ehundrieser
ID: 2152879
Adjusted points to 100
0
 
LVL 4

Expert Comment

by:chewymon
ID: 2152886
If you plugged the power lead into the ground connector, you built a dead short.  The CD-W might be toast.  If you wish, you can clip the two wires that burned as close as possible to the main connector.  Or you might be able to pull them out of the connector.  You really don't need them as they are most likely a power lead for a second floppy drive.  Then check the remaining wires for any signs of bare copper showing or fusing together of the wires.  

I would still try and get the box running with minimal devices to make sure nothing else is fried.  Power to ground shorts can travel in unexpected ways depending on the layout of the circuits.

0
 

Author Comment

by:ehundrieser
ID: 2153025
Thanks chewymon!

I am now convinced that we're on the same wave-lenth, as far as what wires were damaged. Sometimes I find it difficult to describe the innards of a computer, using teche language. Therefore, I'm cautious in proceeding to the next step.

As you recommend, I will pull the previously mentioned wires out of the connector. That'll be the easy part...
None of the thicker, main wires, are damaged.

Next, I will pull the cards, disconnect the floppy, but leave the RAM, CPU, Video and HD connected. Please let me know if that's OK, or if I've forgotten something.

I'm appreciative of your continued assistance!

Erik
0
 
LVL 4

Expert Comment

by:chewymon
ID: 2153239
That's what I would do.

If you get a POST you're on the way.  If not, you may have more problems.

If the box POSTS, but won't load windows, you can reconnect the floppy and try your emergency disk.
0
 

Author Comment

by:ehundrieser
ID: 2153714
I disconnected everything, except RAM, CPU, Video, and HD. No results. Still a blank screen.

I need to know what 'If the box POSTS' refers to.
0
 

Author Comment

by:ehundrieser
ID: 2154075
Three items to ponder:

[1]  The HD appears to be spinning. When I hit enter its responds with spinning noise. (Screen remains blank)

[2]  When I turn the computer on, I hear one long beep and one short beep. Any significance?

[3]  Would it make any difference to test it with a different video card (which I don't have)?



0
 
LVL 4

Accepted Solution

by:
chewymon earned 680 total points
ID: 2154156
The POST stands for Power On Self Test.

That is the information that shows up when you first turn on the box (computer).  Do you get anything when you firs turn on the machine?

1 long beep, 1 short beep usually means a system board problem.  Don't panic yet.  It is possible you knocked something loose.

The fact the HD spins up is good.

Check and reseat your RAM and sll connections.

The CPU is probably good, or you wouldn't get any beeps.

The video card might just need reseating.

If you have an onboard video chip, you can try removing the video card and use the onboard.  you won't get great resoultion, but you can troubleshoot the system.
0
 

Author Comment

by:ehundrieser
ID: 2154396
So far, so good. It's running after all the diagnostic steps. I think reseating the RAM and Cards may have had something to do with it kicking on. And to boot, the CD-Writer turns on as well!
The CD-W tray slides out ok. I still need to set it up... hopefully no surprises there.

With regard to the CD-W, the sound cable at one end has a small white and a larger black plug.

One the sound card, I see [1] black and [1] white connector next to each other, and [1] white connector not too far from the other two. Do I plug in both or just one of them?

Thanks


0
 
LVL 4

Expert Comment

by:chewymon
ID: 2154766
Great! We're almost there.

With regard to the sound cable, colors don't help me much.  Eapecially since I am not very knowledgeable about CD-RWs.  What most CD-ROMs have is a small digital cable and a larger analog cable for different types of sound.  If you have the sound card documentation, it whould tell you which is which.  If not, what kind is it?  I can probably find a reference page.
0
 
LVL 4

Expert Comment

by:chewymon
ID: 2154808
Late night brain fade.  The digital connection goes to the motherboard for data.  The analog goes to the sound card for sound.  It is possible that your particular drive has dual connectors for different types of cards.  Check the documentation that came with the drive.  I would expect that you would need only one.  Sort of like the extra connector on the power lead.
0
 

Author Comment

by:ehundrieser
ID: 2157909
Thanks very much for all your help!

Erik
0

Featured Post

The Eight Noble Truths of Backup and Recovery

How can IT departments tackle the challenges of a Big Data world? This white paper provides a roadmap to success and helps companies ensure that all their data is safe and secure, no matter if it resides on-premise with physical or virtual machines or in the cloud.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Monitor input from a computer is usually nothing special.  In this instance it prevented anyone from using the computer.  This was a preconfiguration that didn't work.
As cyber crime continues to grow in both numbers and sophistication, a troubling trend of optimization has emerged over the last year.
This is my first video review of Microsoft Bookings, I will be doing a part two with a bit more information, but wanted to get this out to you folks.
Add bar graphs to Access queries using Unicode block characters. Graphs appear on every record in the color you want. Give life to numbers. Hopes this gives you ideas on visualizing your data in new ways ~ Create a calculated field in a query: …

719 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question