PSP backlight went out.

[maxRus]

My PSP backlight went out, and wont come back on. Has anybody else have this happen to thier PSP? everything turns on, but the backlight went out. Im talking about the Light that lights up the screen so you can see it in darkness. any help would be appreciated.

any quick fixes, or should I try to return it, should I try to upgrade? or am I stuck like chuck? I dont have a warranty or anything. thanks

P.s its not the Light dimmer button either, I already tried that. ive never dropped it or play homebrew apps on it. thanks for your help

[EnTiTy]

My PSP backlight went out, and wont come back on. Has anybody else have this happen to thier PSP? everything turns on, but the backlight went out. Im talking about the Light that lights up the screen so you can see it in darkness. any help would be appreciated.

any quick fixes, or should I try to return it, should I try to upgrade? or am I stuck like chuck? I dont have a warranty or anything. thanks

P.s its not the Light dimmer button either, I already tried that. ive never dropped it or play homebrew apps on it. thanks for your help

the only option would be to wire up 2 super bright white 5v led's either side of where the bulb would be ive done this to few lcds and ou cant tell the difference tbh + they seem to not drain the battery as much as he gas filled light does.

[Operation Theta]

Go in a corner and CRY!!!

[EnTiTy]

Go in a corner and CRY!!! what kind of response is that grow up

[babb_z]

the only option would be to wire up 2 super bright white 5v led's either side of where the bulb would be ive done this to few lcds and ou cant tell the difference tbh + they seem to not drain the battery as much as he gas filled light does.

That seems like a really good idea for the long term, will regular led's fit inside the psp ok?

[EnTiTy]

That seems like a really good idea for the long term, will regular led's fit inside the psp ok?3mm work fine with slight modification on the edge's with dremel

[SkinnyPete]

Could it not be that the fdc cable has come loose. Have you taken it apart to inspect the cables behind the screen. There are two cables going to the screen, the skinny one is the backlighting cable. Make sure it's seated correctly.

SP.

[EnTiTy]

Could it not be that the fdc cable has come loose. Have you taken it apart to inspect the cables behind the screen. There are two cables going to the screen, the skinny one is the backlighting cable. Make sure it's seated correctly.

SP.
dont you mean fcc ;)

[nope]

3mm work fine with slight modification on the edge's with dremel


have you actually done this or know someone who has done it? just wandering about realtime results

[EnTiTy]

Yes on other lcd displays tho not the psp lcd but it will work and save power to boot.

[deemeph]

I had a similar problem with that exact cable except what happened was the hinge broke off, can this be soldered?

[AdamInc]

my first psp had that issue and i returned it to sony with the 1 year warrenty that they supply with any psp bought, your best bet is to contact sony and see if they can replace it. mine costed me 14 dollar shipping and about 2 week wait for it but i've got it back.

[deemeph]

soldered - works 101%

[kayhan 17#]

ive measuerd the 2 points
and i had 34v!!! (is it right can someone confirm it???)

and at my defect one i have 0v(nothing!)

someone hav a idea??

[samisnake]

you could just buy the backlight plate. i saw one on ebay. itd be so much easier in the long run

[kayhan 17#]

he dude look!
there are 2 points!
and this 2 points is a 4 PIN **** ..
it is the small connector... and when you look at it it is just 2 contacts!
ive measured it and i got 34v???!??!
i think i did a mistake it is 3.4v???
why buy a backlight **** when the backlight LEDs didnt get power!
ive measured the dfeect one = 0v!
so stop giving me stupid ideas bout buying a new one..

[nope]

he dude look!
there are 2 points!
and this 2 points is a 4 PIN **** ..
it is the small connector... and when you look at it it is just 2 contacts!
ive measured it and i got 34v???!??!
i think i did a mistake it is 3.4v???
why buy a backlight **** when the backlight LEDs didnt get power!
ive measured the dfeect one = 0v!
so stop giving me stupid ideas bout buying a new one..


nice attitude, the dudes only trying to help you. And hes right if your getting 3.4v on the pins then your getting power, so surely you need a new backlight and an attitude fix?

[samisnake]

he dude look!
there are 2 points!
and this 2 points is a 4 PIN **** ..
it is the small connector... and when you look at it it is just 2 contacts!
ive measured it and i got 34v???!??!
i think i did a mistake it is 3.4v???
why buy a backlight **** when the backlight LEDs didnt get power!
ive measured the dfeect one = 0v!
so stop giving me stupid ideas bout buying a new one..

if u no wots rong with it big man then sort it. no need to get stroppy. net loser

[kayhan 17#]

hey what ur problem why r u flaming at me??
i just said that i got at a working PSP 3.4v
and at my defect one 0v!
u understand me now?

[nope]

hey what ur problem why r u flaming at me??
i just said that i got at a working PSP 3.4v
and at my defect one 0v!
u understand me now?


now you explain, i understand. well it sounds a bit ****, no juice. All i can suggest is you find somewhere else on the board that supplies n3.4v and tap into it, redirect the wiring. Goodluck.

[lMatmanl]

Hi all, I have exactly the same problem, no power to the backlight. I know this because I tried a screen with a backlight which I know works, but it didn't light up either. Where/how exactly do I test the voltage? Can someone please put up a guide, or maybe even post some pics, showing precisely what to do? I know how to strip the PSP, just don't know where to look on the motherboard.

Thanks. :)

[lenselijer]

you need to solder on the fuse of the backlight then you will get 34volt again. Its not 3.4volt its really 34volt, measure yourself if you dont trust me.

[lMatmanl]

So its just an onboard fuse thats blown? Could some one explain how to do this please?

[mame-man]

you need to solder on the fuse of the backlight then you will get 34volt again. Its not 3.4volt its really 34volt, measure yourself if you dont trust me.

I have had similar units, if he's getting 3.4v then the fuse is fine (check by putting a multimeter set to continuity accross the fuse) with the battery out :)

when the fuse has gone it gets 0 volts across pins 1 and 4 of the backlight.

I currently have a board here where the fuse has been jumpered due to being blown out, but it only puts out 3.4 volts out across pins 1 and 4. It looks like whatever steps up the voltage (I assume the small square component just below and to the left of the fuse as it appears to be in that circuit) has gone out when the fuse went also.

So far from what i have seen its pretty useless :(

[lenselijer]

yes i had that same problem as you, i threw the board away, if it gives 3,4volt there is something else wrong on the motherboard, and i couldnt find any information about what it could be :(

[lMatmanl]

Yes! Bridged the fuse with solder and its working fine! :D

[PSP !Maniac!]

Can anybody say how to bridge Solder wth Fuse ? ... where's solder and where's fuse ? Do you have any photos ?

[bugone]

I'm having a problem wih my screen. The backlight seems to work- goes out when you pull the 4 wire FPC and adjusts with the display button. But the image is very pale/lacking black. Any suggestions appreciated

[mame-man]

Can anybody say how to bridge Solder wth Fuse ? ... where's solder and where's fuse ? Do you have any photos ?

pic of fuse location here
http://psp-team.pl/forumpsp/index.php?act=Attach&type=post&id=240

2.5 amp fuse is for the charging circuit
1 amp is for the usb circuit
.5amp is for the backlight

[PSP !Maniac!]

Thanks for the photo of fuses ;) I have new screen wth backlight and backlight doesn't work too :( So it must be the 4 pin connector ? how to bridge it ? :(

[mame-man]

Thanks for the photo of fuses ;) I have new screen wth backlight and backlight doesn't work too :( So it must be the 4 pin connector ? how to bridge it ? :(

first check it is the fuse with a multimeter set to continuity to see if the fuse is indeed the problem.

If it is the problem, simply bridge the fuse with a bit of 30 gauge wire soldered to each end. gotta say if your not good with a soldering iron, let someone who is do it. too much heat and the surface mount fuse will come off and you will then have to bridge the mounting points, or worse there is a couple of other components very close that you may fry with too large a soldering iron or a twitchy hand!!

also as the metal frame for the screen sits above it, make sure you don't make a mess of the soldering and end up with it stacked ontop and as a result touching the underside of the metal frame.

[PSP !Maniac!]

I don't know what is going on i have 3.6 volts on fuse and on 1 and 4 pins 0.25 :eek: so when i bridge 1 and 4 with fuse it will be 3.6 again ? :)

[mame-man]

I don't know what is going on i have 3.6 volts on fuse and on 1 and 4 pins 0.25 :eek: so when i bridge 1 and 4 with fuse it will be 3.6 again ? :)

you do not bridge any of the 4 wires that run the backlight!! DO NOT

check to see if you have 3.6 volts on both sides of the backlight fuse.

if you do have voltage at both ends of the fuse, you should have 33volts on either pin 1 or 4 of the backlight connector. (think it's 4).

If the fuse is getting power through it ok, but you do not have 33volts at the backlight connector, then the chances are the component that transforms the voltage (step up) is bad. If this is the case the board may as well be chucked :(

[PSP !Maniac!]

what do you mean on the both sides ?

look thats the fuse and i'm checking here :

red
\/
___
| |
| |
|___|

/\
black

Or should i do this different way ? Like this :

black > | | < red
| |
black > | | < red
Or i don't know how to check it :( :eek:

[mame-man]

the fuse has a silver end towards the top of the psp board, a black centre section and another silver end towards the bottom.

voltage comes in at the top side, travels threw the fuse and out the bottom.

you need to check that you have voltage between ground (the gold coloured sections of the motherboard where the screws go threw) and the bottom section of the fuse. (psp turn on).

or if you have a continuity setting on your multimeter, put one probe on the top of the fuse(silver) and another on the bottom end of the fuse(silver). depending on your meter, it should if the fuse is good, either beep (if your meter has audio) or show a dead short. having a reading of 0. (this is done with the battery out and the psp turned off).

If that still seems tough to follow, with your psp turn on check the voltage with your meter on the backlight connector on pins 1 and 4. (one probe on pin 1 and the other probe on pin 4). should be 33volts DC.

If the voltage at the backlight is 0, then the fuse is most likly the cause, if the voltage is something other than 0 but less than 33volts then there is another component that is as fault and as yet no one has determind what component that is. (junk motherboard).

[PSP !Maniac!]

in the top of fuse i have 4.99 :eek: :eek: :eek: on the bottom i have 0.09 sometimes 0.24 when it's 0.24 it's falling to 0.00 and again it's 0.24 :( ?? :confused:

Edit:

So the fuse is the problem ? Where i can buy new fuse ? or where is the fuse on board that i can brigde to backlight fuse ?

[mame-man]

in the top of fuse i have 4.99 :eek: :eek: :eek: on the bottom i have 0.09 sometimes 0.24 when it's 0.24 it's falling to 0.00 and again it's 0.24 :( ?? :confused:

Edit:

So the fuse is the problem ? Where i can buy new fuse ? or where is the fuse on board that i can brigde to backlight fuse ?

well around 4.99 to 5.24volts would be correct at the top of the fuse. and you should have the same at the bottom end of the fuse. if not the fuse is blown. you may be able to find a smt fuse online somewhere. not sure to be honest as i always simply bridge it.

You got me lost on your question of where is the fuse??? you just said you measured the voltage at it?? so you must know where it is???

are you sure your looking at the fuse? check some of the other recent threads on backlights in the past 2 days, they have a link to a pic of where the fuses are located. the backlight is the .5 amp one.

[PSP !Maniac!]

yes u r right (i tought that there's somewhere second fuse 0.5A - you know i just thought that i can bridge this fuse with another fuse) ! now everything is clear ;) ... Can you show me how did u birdged it ? Can you take the photo of bridgeing ? I think i understand but i just want to see it because i don't want to fail. I Just want to see what i have to do ;) (Sorry for my English but i'm from poland and my English isn't good hehe :D )


Edit:

Yeah !! The Backlight WORKS AGAIN !! ;) I'm so happy ;) MEGA Thanks for you Mame-Man ;) THANKS !!! I will do a guide from our discusion with BIG Thanks for you ;) :*:*:*

[mame-man]

yes u r right (i tought that there's somewhere second fuse 0.5A - you know i just thought that i can bridge this fuse with another fuse) ! now everything is clear ;) ... Can you show me how did u birdged it ? Can you take the photo of bridgeing ? I think i understand but i just want to see it because i don't want to fail. I Just want to see what i have to do ;) (Sorry for my English but i'm from poland and my English isn't good hehe :D )


Edit:

Yeah !! The Backlight WORKS AGAIN !! ;) I'm so happy ;) MEGA Thanks for you Mame-Man ;) THANKS !!! I will do a guide from our discusion with BIG Thanks for you ;) :*:*:*

nice to hear it mate, would be good if you do a how to for the masses out there :)

[lezek]

Has anyone a photo of the bridged fuse?
I've the same problem (I think), and I don't understand how it must be... :(

[briripper]

I would also like to see a pic of fuse and how to get to it at the moment i have 31.8v on a good psp and 3.8v on a ng psp and would like to test fuse to see if i can cure this problom
thanks in advance for any help

[moomoochoo]

These questions are in regards to the original psp (not the light/slim or whatever it's called).

Is the psp backlight set up in a series or is it set up in parallel? On the psp backlight connector there are four points. Can someone tell me what the voltage is for each of these points and the polarity? I guess that the voltage will change depending on the brightness level you have selected for your psp-so a range of working values would be more than great.

The reason I ask is that I would like to provide an alternate power source for my psp backlight. Either that or I will try to make my own backlight using LEDs and an alternate power source.

If anyone has tried to make a new backlight specifically for the psp, I'd love to know how it went.
Thanks

[_Chrow_]

Hello everybody im new around here so be nice with me plz ...

My problem as the same sintoms as the other fellaws over here ..

I bought an old psp (FAT) to a friend of mine and after a few weeks it started to break the screen ( need to do punch sometimes to screen comes back :eek: ) he sayd was just a bad contact on the screen .. so i was so tired of this happening so i decided to open the psp and remove the lcd screen to see what is the real problem ... then i suddenly discover this

PSP IMAGE 1 (http://clientes.netvisao.pt/fedosanj/psp.jpg)


IT seems the Backlight place has gone on the motherboard !! (CN 4502 White Adaptor GONE !! )

and then i found this :eek:

PSP IMAGE 2 (http://clientes.netvisao.pt/fedosanj/dass.jpg)

Now i understand why this wasnt working anymore ...

I saw a few posts and it seems there is a way to solder it back or bridge it ... unfortanly im not good as techinician solder but i have some friends that can handle the problem ...

I d like to know if someone can help me out on fixing this ... some images can help to understand what to do ...

Thanks for your patience im not very good at english i hope u all can understand my problem ...

waiting for answers :cool: