Results 1 to 10 of 10

Thread: Carputer not posting/booting

  1. #1
    Newbie
    Join Date
    Aug 2006
    Posts
    15

    Carputer not posting/booting

    Hi! I was hoping to get some help, I didn't find much from searching the forum but I apologize in advance if i missed a post on this topic.

    The problem:

    My computer won't post on car power, the computer will start automatically on car power, the fans will begin to spin but it doesn't post or boot to OS. I know it doesn't get to posting b/c there is no posting beep.

    The puter runs fine on wall outlet power, posting and booting normally.

    My Specs:

    - I am running a EPIA VIA MII mobo,

    - PicoPSU-60W/80W max ATX power supply (I've been testing w/o any peripherals attached so those don't come into consideration in terms of power consumption)

    - I am also using a CNX-P1900 as my power supply controller.


    What I've tried while troubleshooting:

    - Like I said above, the puter runs fine on house outlet power w/ adapter

    - I've also checked to see if the problem was related to the auto-start signal from the P1900, but I the same problem occurs when using a manual start switch while on car power. Also, the puter auto-starts and auto-shuts down when the car is turned on and off, so I think that is working properly.

    - I've checked the actual output voltage from the P1900 and it seems sufficient and constant (I have the 1900 jumpered to 20V).

    - (i just thought this smile was funny)

    - One thing that occurs to me now, that I haven't checked yet is to ensure the power line is grounded appropriately -- it should be (else the puter shouldn't start at all) but I will have to double check that.


    Any suggestions as to a solution would be much appreciated, thanks in advance for the help!

    -Grruel

  2. #2
    Fusion Brain Creator 2k1Toaster's Avatar
    Join Date
    Mar 2006
    Location
    Colorado, but Canadian!
    Posts
    10,052
    You are outputting 20V on the carnetix into the PicoPSU?!

    The PicoPSU DOES NOT REGULATE THE 12v LINE. it takes whatever you send in as 12v exactly. That is why it is not made for car use.

    So if you are feeding 20V into the picopsu, then all the devices that are using 12v, are getting 20v and you could have blown them.

    PicoPSU is meant only for house use.
    Fusion Brain Version 6 Released!
    1.9in x 2.9in -- 47mm x 73mm
    30 Digital Outputs -- Directly drive a relay
    15 Analogue Inputs -- Read sensors like temperature, light, distance, acceleration, and more
    Buy now in the MP3Car.com Store

  3. #3
    Newbie
    Join Date
    Aug 2006
    Posts
    15
    Don't worry, my devices are fine, I took care to protect them, however, it is frustrating to hear this. Although I have a decent amount of experience with computers, this is my first journey into carputers and it's frustrating my reading of the specs and manuals for the power supply didn't produce the information you just gave me. In fact, the mini-box web page actually totes it as "Perfect canditate for vehicle or solar computing." I suppose i should have known not to trust that considering they spelled candidate wrong .

    Could you suggest a "dumb" power source with the form factor to fit a ZoomPC case and a VIA MII mobo, enough power to suit my needs (between 60 to 120), and which accepts a 18 to 20 v in?

    I already have the P1900 doing the auto start/shutdown functions so I don't really need a power supply that does it too, in fact I suspect that would cause problems.

    Thanks!

    -G

  4. #4
    Fusion Brain Creator 2k1Toaster's Avatar
    Join Date
    Mar 2006
    Location
    Colorado, but Canadian!
    Posts
    10,052
    Quote Originally Posted by Grruel View Post
    Don't worry, my devices are fine, I took care to protect them, however, it is frustrating to hear this.
    If you were trying to power your motherboard with that setup, then you could have very well fried it. If it still works on wall power then you are hella lucky!

    Don't try th pico again.

    Quote Originally Posted by Grruel View Post
    Although I have a decent amount of experience with computers, this is my first journey into carputers and it's frustrating my reading of the specs and manuals for the power supply didn't produce the information you just gave me. In fact, the mini-box web page actually totes it as "Perfect canditate for vehicle or solar computing." I suppose i should have known not to trust that considering they spelled candidate wrong .
    About a year and a bit ago when I was collecting parts for my carputer, I too bought a PicoPSU. I couldn't find it saying what the 12v line was putting out in the 2 page "manual". So I hooked it up to a variable powersupply at my university and first sent in 12v. The "12v" out of the picopsu was fine. I sent 13.8 volts, and to my surprise the "12v" was now exactly 13.8v. The 5v line was around 6v, and the 3.3v line was closer to 4. It seems like it is not regulated smartly. It just assumes there is a nice 12v coming in, and divides tehe voltage appropriately. That is why it is so small!

    Quote Originally Posted by Grruel View Post
    Could you suggest a "dumb" power source with the form factor to fit a ZoomPC case and a VIA MII mobo, enough power to suit my needs (between 60 to 120), and which accepts a 18 to 20 v in?
    Not right now, but I can look later tonight for you. I think you can even make one with one of the threads on here using your carnetix.

    Quote Originally Posted by Grruel View Post
    I already have the P1900 doing the auto start/shutdown functions so I don't really need a power supply that does it too, in fact I suspect that would cause problems.

    Thanks!

    -G
    It won't cause problems. In fact, why even use the carnetix?! Im sure if you posted it for sale, somebody will buy it for the same amount you can buy an M2 or Oupus for. Seems like the best solution.

    Thankfully the guy on eBay I bought my pico from was nice enough to let me exchange it for no fees and pay the extra to buy an M2 from him. I also gave him a bit more to cover his lost eBay/PayPal fees because I felt bad and he didn't ask for them. Maybe you can still return it.
    Fusion Brain Version 6 Released!
    1.9in x 2.9in -- 47mm x 73mm
    30 Digital Outputs -- Directly drive a relay
    15 Analogue Inputs -- Read sensors like temperature, light, distance, acceleration, and more
    Buy now in the MP3Car.com Store

  5. #5
    Newbie
    Join Date
    Aug 2006
    Posts
    15
    Any suggestions later would be groovy, I appreciate the help! If a smart power source would work w/o interfering with the 1900s operation I might just get one of those, they are obviously a good choice since they are custom made for the purpose, and the only reason I didn't buy one originally is b/c I was afraid they wouldn't work properly with the 1900 and b/c they are slightly more expensive.

    I am using a P1900 b/c I originally was planning on using a prefab computer, but then wound up getting some of the parts for the one i am currently using for free from a friend and decided just to build one as opposed to repairing one of the busted laptops that lay strewn throughout my apt like some ill planned tech mass grave. The 1900 is already wired into my car and linked up to my screen and DVD drive, so I would prefer just keeping it.

    I'm sure I can recycle the PICO in some other project or sell it. I know a lot of tech geeks and we exchange left over parts all the time.

    Again, thanks for the help Toaster, your response was much quicker than I had hoped for . I'm sure you're familiar with the appeal of quick, informed answers when you are supremely stuck and frustrated with a problem.

    -G

  6. #6
    Maximum Bitrate crooper's Avatar
    Join Date
    Nov 2006
    Location
    Everett, WA
    Posts
    467
    I've found that knowing about how to build computers and such only gets you halfway there with CarPCs... you have to understand DC power and how the car electrical system works. That was my major stumbling block.

  7. #7
    Newbie
    Join Date
    Aug 2006
    Posts
    15
    Yes, I agree with you, but part of the reason i decided to build a carputer was to learn about car electrical systems... so I guess I can't complain.

    -G

  8. #8
    Low Bitrate
    Join Date
    Dec 2006
    Posts
    64
    did you figure out the problem yet? I'm having similar issues.

  9. #9
    Low Bitrate
    Join Date
    Dec 2006
    Posts
    64
    i figured it out. The power switch cable i was using seems to only work one way. when i took the one off the motherboard and switched it to the ps, everything works fine.

  10. #10
    Newbie
    Join Date
    Aug 2006
    Posts
    15
    I did figure out the problem for myself. I switched to a C4-CT-DC150L. This allowed me to power and post via car power. Then I had to reset the carnetix 1900 back to the J3 jumper setting (I had switched to the older version in an effort to get my last power source to work). And it worked.

    Thanks for everyones help!

Similar Threads

  1. My 2006 Scion xB (portable) Carputer setup! w/pics!
    By breaker021 in forum Show off your project
    Replies: 26
    Last Post: 01-05-2007, 09:34 AM
  2. Carputer confusion- n00b needing help
    By TonyMartin in forum Newbie
    Replies: 11
    Last Post: 03-10-2006, 12:11 PM
  3. Carputer confusion- n00b needing help
    By TonyMartin in forum General Hardware Discussion
    Replies: 2
    Last Post: 03-08-2006, 09:43 PM
  4. wikipedia: carputer definition
    By pRoFiT in forum Off Topic
    Replies: 2
    Last Post: 12-31-2005, 08:32 AM
  5. Good time to buy carputer components?
    By Linus in forum General MP3Car Discussion
    Replies: 19
    Last Post: 11-25-2004, 08:57 PM

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •