Question about Sony Playstation 3 (PS3) Console

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Blown ps3 mosfet

I have a ps3 (cecha01 model) which is out of warranty and the warranty sticker has also been voided. The blu-ray drive will not work do to the mosfet with the number 4943b being blown out. All I have been able to find out about this mosfet is that it is a Dual P-Channel 20-V (D-S) MOSFET. I am trying to find a replacement for this but I can not retain the specifics of this item. I am wondering if it is a “over voltage protection“, or just the “power supplies“ mosfet. I have gathered (I think) that the voltage is from 5v to 12v. I would be grateful for what ever info you have on this mosfet.

Thank you for you time.

Posted by grizzal81 on


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this should have all the specs you need. i have the same issue and have spent days searching and found this. hope this helps

Posted on May 20, 2011

  • kohalisky17 May 21, 2011

    the actual part number is Si4943BDY. google that and you will find the replacements for about $1.50



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Having Blu ray issues, not sure if the blu ray games work (don't think we have any) but regular games and digital movies work just fine just not blu ray. We bought a extended warrenty with it, but

Sounds like the Blue Laser may have gone bad. Try swapping out the internal blu ray drive with another one. You will have to take it apart and of course that would void the warranty unless you can make it look like the sticker on the bottom wasn't tampered with. On second thought if it's still under warranty just send it in and get your money's worth! ; )

Jan 12, 2013 | Sony Playstation 3 (PS3) Console

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My ps3 160gb will need assistance how can i open it???

A PS3 can be opened rather easily, but if your PS3 is newer, or still has a warranty on it, I wouldn't open the case. If you're unsure of whether you still have a warranty on it, you can call 1-800-345-7669 and they will give you instructions. If you open your case, you WILL void the warranty. That being said, here goes:

1. Locate the side of the PS3 with the HDD symbol on it(The left side of the PS3). Above the HDD symbol, there is a sticker that covers a plastic cover. Removing this sticker will void any warranty still on the PS3.
2. Peel off the sticker and gently pry the plastic cover out. There is a recessed area with a screw at the bottom, use a small screwdriver to unscrew it.
3. The plastic cover on top of the PS3 is now loose, and you can slide the plastic cover towards the left side of the PS3(where you just removed the sticker) and lift it off.
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Jul 06, 2011 | Sony Playstation 3 (PS3) Console

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Hi jhoover64,

Launch PS3 models and PS3 models with backwards compability have different disk lenses for blu-ray disks and dvd disks. Which means that you can have a faulty blu-ray lense that doesn't work, but as long as your dvd disk lense works you'll be able to play PS2 games and DVD movies.

Sadly the only way to repair a fault disk lense is by getting it to official tech support. You could try ordering the replacement parts and having it repaired by a third party or yourself but this is not recommended since it void the PS3 warranty.

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Mar 08, 2011 | Sony Playstation 3 (PS3) Console

1 Answer

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Hi and welcome to FixYa

Ok for the internet problems try connecting it directly to your internet modem without the router and also try connecting it with the wireless option of the ps3, if none of those options works, your ps3 network card is pretty much fried. About the disc making funny noise you might want to first if you know nothing about ps3 take it to a repair store after the diagnostic of the funny noises the next symptom you are going to get is problems reading bluray discs and after that you will probably have to replace the WHOLE DRIVE piece or if you are lucky just the PS3 lens. here are links for more info about prices:

PS3 Whole Drive:

PS3 Lens:

remember after buying any of those check your PS3 Model.



Mar 08, 2011 | Video Game Consoles & Games

1 Answer


This is because of an internal gear fault within your PS3. It is possible that someone has taken the PS3 apart before and not put the drive ack properly or there is a possibility that one of the gears inside has broken. You could have a look yourself by following a guide on youtube, just google PS3 blu ray videos. At the very worst you would have to buy a new mechanism for your PS3 blu ray.

This is not actually that hard as all you would need to do is buy a faulty blu ray drive (one where the laser is faulty) and swap over your working laser into it. This would cure your problem. The only thing you have to be careful of is that you get the same model blu ray player as there are several types. To identify the right one you need your model number of your PS3, it is on a white sticker on the back and starts CECH--.

This will be your cheapest option for repairing it unless it is under warranty, Sony have a 1 year warranty with new consoles and will replace it free of charge if it is still in warranty. If it is out of warranty Sony will want around £150 to fix it.

I hope this information helps and thank you for using FixYa

Feb 15, 2011 | Activision Video Game Consoles & Games

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After you have removed this screw the whole top of the PS3 slides to the left and comes off. Underneath the PS3 top cover there is another plastic cover with screws all around it. As you are looking from the front of the console there is a marking on the plastic cover that points to one screw that says "S", this is a shorter screw and only goes back in that place. Remove all the screws. Just to the left of the short screw there is a small recess in the plastic casing where you have to push a little black clip back gently while lifting the cover from the back of the PS3. It should all lift forward and come off.

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Hope this helps and thank you for using FixYa

Aug 29, 2010 | Sony Playstation 3 (PS3) Console

1 Answer

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