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[CLD-M90] No power, no light, no nothing.
https://forum.lddb.com/viewtopic.php?f=53&t=9161		 Page 1 of 1
Author:  drductape [ 01 Jul 2020, 04:51 ]
Post subject:  [CLD-M90] No power, no light, no nothing.
Hello everyone. I recently acquired my first LD player for $10 at a thrift store. I was super excited and plugged it in and pressed the power button when I got home, and nothing happened.
No lights, no beep, absolutely nothing. I tried pressing some of the other buttons and nothing happened as well.

I figured "well, it's probably a blown fuse." So I opened it up and checked all the fuses I could find (I found 4) and they all were fine according to my multimeter.

Then I was really confused. I figured "well maybe it's a blown cap?" and nope, everything looked normal. No brown/orange dust, no puffed out tops and not even very much dust.

So I manually opened the disc tray and tried to look at the rest of the board. It looked fine as well.

I'm really at a loss for words here. I'm very frustrated that it doesn't work first of all, but I'm also confused that everything seems completely normal.
I hope you guys can help me out.

I can post photos if needed. (Just tell me what part to capture).

Thanks in advance.
Author:  deadlegion [ 01 Jul 2020, 05:00 ]
Post subject:  Re: [CLD-M90] No power, no light, no nothing.
It should be the power supply, somewhere. Even if the fuses are ok something is wrong there somewhere...transformer, voltage regulators, caps and all sorts of things can stop working properly in electrical products and have no obvious physical signs of being suspect.

Over here thrift stores can't sell electrical goods without testing them for safety and functionality. A dead item like that would be binned well before getting anywhere near the store floor :lol:
Take it back, get a refund (get them to plug it in if they don't believe you) and ask to keep it anyway (even if you say you'll dispose of it for them).
Author:  drductape [ 01 Jul 2020, 05:05 ]
Post subject:  Re: [CLD-M90] No power, no light, no nothing.
I can't do that because that was that store's 2nd to last day of operation. They were having a closeout sale where everything that fit in a bag was $1 and everything else was 90% off.
I managed to bag (literally) a dual tape deck for $1 but the LD player was too big. The lady at the front recognized that it was a pioneer and said "Well, say that's worth $100. That means you pay $10".
Should the store have not been closing, I wouldn't have had it right now.

Also the store was 2 hours away. I was on a small trip when I got it so that's another reason I can't do that lol
Author:  deadlegion [ 01 Jul 2020, 05:07 ]
Post subject:  Re: [CLD-M90] No power, no light, no nothing.
Oh well it's only $10 so no big loss. Only mentioned it because it's the first thing you should do :)

I test stuff for a Salvos Store btw, not technically thrift as there are hardly any volunteers.
Author:  drductape [ 01 Jul 2020, 05:13 ]
Post subject:  Re: [CLD-M90] No power, no light, no nothing.
So is my LD player dead in the water? No hope for it? It looks completely fine except for the obvious problem of not running. I figure it's something like a dead part somewhere near the beginning of the chain, but that's just me.
Author:  deadlegion [ 01 Jul 2020, 05:19 ]
Post subject:  Re: [CLD-M90] No power, no light, no nothing.
drductape wrote:
So is my LD player dead in the water? No hope for it? It looks completely fine except for the obvious problem of not running. I figure it's something like a dead part somewhere near the beginning of the chain, but that's just me.


My technical expertise is very limited so I won't be of any real help I'm afraid.
In a case like this I would start with testing the power cord itself and move onto the power supply from there.
The thing with psu's is there are some pretty dangerous voltages and caps can retain some of that, I wouldn't be poking around unless you're familiar with such things.
Author:  drductape [ 01 Jul 2020, 05:22 ]
Post subject:  Re: [CLD-M90] No power, no light, no nothing.
Yeah I'll be careful around the PSU.
It's not dangerous, though. Capacitors don't hold energy after being unplugged for an hour. The player has been unplugged for several hours.
Author:  ldfan [ 01 Jul 2020, 05:23 ]
Post subject:  Re: [CLD-M90] No power, no light, no nothing.
There are any number of issues that could be wrong in your power supply (it's most likely a power supply and that's usually a good thing as they are easier to fix than if the unit has a bad microprocessor).

Just take a nice clear picture of the power supply section and maybe there is something visual we can see that might be obvious. Either way, a repair shop is probably in your player's future.
Author:  deadlegion [ 01 Jul 2020, 05:25 ]
Post subject:  Re: [CLD-M90] No power, no light, no nothing.
drductape wrote:
Yeah I'll be careful around the PSU.
It's not dangerous, though. Capacitors don't hold energy after being unplugged for an hour. The player has been unplugged for several hours.


I was just thinking you shouldn't be testing psu output with it powered on unless you know what you're doing, and yeah testing just after unplugging. Some caps can hold charge longer than 1 hour but idk if there are any of those there.
Author:  drductape [ 01 Jul 2020, 05:32 ]
Post subject:  Re: [CLD-M90] No power, no light, no nothing.
Here are the images as requested. I can send some shots of the rest of the board but I'll cross that bridge when I come to it.
https://imgur.com/a/IgYuXBJ
Author:  deadlegion [ 01 Jul 2020, 05:40 ]
Post subject:  Re: [CLD-M90] No power, no light, no nothing.
Are a couple of those large caps leaking? Or is it just glue and why is it there?
Author:  drductape [ 01 Jul 2020, 05:44 ]
Post subject:  Re: [CLD-M90] No power, no light, no nothing.
I was wondering that too. It appears to be glue because it's hard. Cap leakage is usually black/dark brown I think.
Also gluing caps down is not unheard of, although I don't know why anyone would do it.
Author:  deadlegion [ 01 Jul 2020, 05:54 ]
Post subject:  Re: [CLD-M90] No power, no light, no nothing.
drductape wrote:
I was wondering that too. It appears to be glue because it's hard. Cap leakage is usually black/dark brown I think.
Also gluing caps down is not unheard of, although I don't know why anyone would do it.


Maybe I've just forgotten seeing them glued. I can't see anything obvious just as you said.
But transformers can fail, caps can look good but be faulty so no sign of power, voltage regs can be shot too.
If you have a combination of issues then no sign of life at all isn't a surprise.

See with other stuff if I have a workable substitute I'd swap to another psu to test.
Last time I did that was with a Nintendo 64 that seemed dead, opened the psu and the fuse was ok and no sign of faulty parts.
Instead of spending money not knowing what was actually wrong, I rigged up a PC atx psu as a substitute and the console worked fine.
So I went ahead and ordered a replacement N64 psu for the console.
Author:  ldfan [ 01 Jul 2020, 06:18 ]
Post subject:  Re: [CLD-M90] No power, no light, no nothing.
drductape wrote:
Also gluing caps down is not unheard of, although I don't know why anyone would do it.


I think they do it because of some vibration issue that could make the caps work loose. But I could be wrong.

Anyway, you might want to check what I circled here first....

Image

I think these are resettable fuses but not sure. A voltmeter should indicate continuity if they are still good (I believe).
Author:  odotb3 [ 01 Jul 2020, 13:25 ]
Post subject:  Re: [CLD-M90] No power, no light, no nothing.
Im pretty sure those are ceramic capacitors. What you need to do is test the output of the supply for voltage with a voltmeter. If you dont feel comfortable doing that you could recap the whole board and see if it fixes it. No guarantees but would be a fun project. If you have an esr meter you can test each cap, ideally out of circuit. Don't forget you can use the diode test on the multimeter to test for blown diodes, zeners or transistors.

This is the output that you need to check. The voltages are labelled on the board for your convenience! :thumbup:
Image
Author:  rein-o [ 01 Jul 2020, 16:22 ]
Post subject:  Re: [CLD-M90] No power, no light, no nothing.
Also make sure you test things from one end etc. Make sure the actual power cable is fine.

Get a multi meter and test from one end of wire to the next, I've had some electronics that had bad cables.

Didn't read all of above but just my free advice :ugeek:
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