PSone booting to black screen. (no startup)

Discussion in 'Sony Programming and Development' started by HEX1GON, Feb 5, 2012.

  1. HEX1GON

    HEX1GON FREEZE! Scumbag

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    Here is a mystery!

    I have a PSone, that would boot to a black screen, I though it was the modchip screwing around with it. The modchip has been in there ever since I bought the PSone many moons ago.

    Anyway, what would happen is I turn it on and not even a flicker on the TV to say it connected so no signal is going to the TV. Rebooted and still nothing, tried turning on with a CD inside, the CD would spin but again no signal.

    I opened up the PSone, blew all the dust out of it re-seated the CDKit and powered it on. Still no signal :confused:

    Checked the cables, tried 3 others.. all the same. Rules that out.

    Turned the pot just a little bit, amazing! I have an intro but the sound is muddled up.. Why is this? Turn it back a little no signal...

    I later on power up the PSone with the board only.. this means no casing nothing just the board. It boots without a problem, so I remove the bottom metal shielding and now it's in perfect working order.

    Could anyone explain why this would *just* happen to a console that's been sitting on the shelf for years without being moved or dropped?
    I've always looked after my PSone.. I have no idea how this happened..:shrug:

    As for now I've got it running for a few months now, so I'm not looking for another solution, I just want some kind of explanation. It's been bothering me ever since.
     
  2. l_oliveira

    l_oliveira Officer at Arms

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    Try an original disc which is meant for the console (same region)

    If it works, the bios is not being patched and that's why it's hanging at a black screen (with a mismatched region disc). :shrug:
     
  3. H360

    H360 Familiar Face

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    Sounds like it is shorting to me.
     
  4. HEX1GON

    HEX1GON FREEZE! Scumbag

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    Even without a Disc it should boot shouldn't it?

    @Haunted360
    That's what I though, cause once the shielding was removed it works without a problem. However how this just happened out of the blue doesn't make sense, the console stays put all the time.
     
  5. APE

    APE Site Supporter 2015

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    Shorting what to what and where? Useless post if I ever saw one.
     
  6. cybdyn

    cybdyn Embedded developer (MCU & FPGA)

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    ye. the main reason is shorting.
    i can't exactly say where is shorting cause i dont hold in hand this console. but it's very often in my practice too.

    metal parts have a tendency to rust. because it is produced since 2000. that's what APE calls Magic, and wanna say that only warlock have done with this)))
    hey people, don't even try explain this things, just read the spell as long as it does not work )))
     
    Last edited: Feb 6, 2012
  7. H360

    H360 Familiar Face

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    HeXiGON even said, "Later on, I powered up the PSone with the board only.. this means no casing nothing just the board. It boots without a problem, so I removed the bottom metal shielding and now it's in perfect working order."

    @HeXiGON, like Cybdyn said, the metal rusts and can even bend or 'pop' from different temperatures.

    You do not really need these shield anyway. They are mainly used for RF interference cancellation, and sometime to help with heat.
     
    Last edited: Mar 12, 2012
  8. Bad_Ad84

    Bad_Ad84 The Tick

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    Take out the board, place paper cut to shape in the base ontop of the metal shied, then refit board and drive.

    Had this happen once or twice when shipping a console, when it arrives its got bent/moved and just shorts
     
  9. SilverBull

    SilverBull Site Supporter 2010,2011,2013,2014,2015.SitePatron

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    If the shields were not needed, the engineers would not have build them into the machine in the first place. For short testing, it is usually okay to just remove them, but I strongly suggest never to do so for an extended amount of time :fresh:.

    Reasons? Fire hazard (granted, far fetched, but still a possibility for all electronic devices), insurance and RF interference.

    I do not know how such things are handled in your country, but around here, it can get you into real trouble if something happens. Courts say that you must not leave a running electronic device unattended, even if it has not been tampered with, and even if it is a device that is not meant for somebody constantly sitting nearby. An infamous example is a washing machine that had flooded a full room while the owner was absent (around the block to the supermarket). Insurance refused the request, the case went to court, resulting in the insurance company not having to pay anything. So if this is representative for day-to-day devices, I wouldn't like to know how they'd rule for something more "obscure", even if its just a gaming console.

    As for RF interference, its even worse. If somebody detects the interference (any ham radio operators nearby?), they can call the Federal Network Agency (Bundesnetzagentur), which will then send a measurement van. If they locate the interference (and chances are they will), they can force the offending equipment to be disabled permanently (I'm not sure whether they can confiscate it) and the one responsible for it being charged for all expenses (RF specialists aren't cheap :033:).

    The situation may be different for you, but I'd find it hard to believe that there are no penalties if you just send out RF interference on arbitrary frequencies.
     
  10. H360

    H360 Familiar Face

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    We do not have such laws like this Australia.

    Does that mean you have to switch off your fridge when you are not home? :lol:
     
  11. cybdyn

    cybdyn Embedded developer (MCU & FPGA)

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    ye, it can work without shield, but it helps with temperature and overheating.
    so better dont remove it.
    just look at the points where shield contacts with board, clean this area, in my opinion cleaning must help.
    or as BAD_AD84 say - isolate it by paper.
     
  12. cybdyn

    cybdyn Embedded developer (MCU & FPGA)

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    Haunted360 - I think SilverBull wanna say -dont fix it by yourself , bring it to the service.
    in the case with washing machine - i agree with SilverBull.
    but ps one power supply is only 7,5 volt. so itsnot too dangerous fix it at home.
     
  13. H360

    H360 Familiar Face

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    Sony will not service a PSone / PS1 unless you organise it and call them up.

    However, I do understand what he means :)
     
  14. HEX1GON

    HEX1GON FREEZE! Scumbag

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    Ah, Bad_Ad84 really good idea bud. I'll do that.

    Possibly the metal has bent overtime, I'll place it back in later on with paper. I'll post the results as well.
     
  15. pepster98

    pepster98 Member

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    i just got a ps1 and have the same problem
    the problem is the av multi out port's pins are loose this means you nees to jiggil the cable until you get results this is probaly due to the plastic case wearing over time (kinda like an old record warps)



    in any case you should plug the cable in, turn it on while holding the cable by its end and move it around until you get picture
     
  16. H360

    H360 Familiar Face

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    Usually, this is the pins in the cable itself. You can bend them back up with a needle.
     
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