5920G LCD Upgrade

Check Samsung LTN154XB-L01 inverter and it work with my 5920G

 

Really? That's great news! So you say that you run both lamps on 5920G with LTN154XB-L01 and MPV5K003 inverter? It means that I have two faulty inverters!

 

Ok. I have mapped all the hard stuff except a +5 ALW on the LED panel side, and the DAC_BRIG, DISP_OFF on the connector side (these went to the separate LED inverter for the original screen. Can anyone shed some light on these three cables? I have included the Laptop MB (LA-4595P) connector pin out, the original inverter pin out going into the inverter, and the LED panel (LTN154CT04-D01) pinout. The inverter connections INV_PWR maps to the INV_SRC, the GND maps to the VBL-, and the INV-PWM maps to INV_PWM.

 

Your DISP_OFF is my ENA, which is useless in this case, or at least I couldn't think of anything useful. As for DAC_BRIG, it's probably over-current protection, which is not needed. You'll have to find a 5V source on your MoBo. As we deducted earlier in the topic, it is for kick-starting the back-light.

 

I wonder... Pin 33,36,37,38,and 35 go to the "Inverter" for the old LED screen (LTN154AT12-101). Maybe that inverter outputs a 5v line along side the others. I might have to take another look at the schematics. Would a USB 5v from a header have enough amps to serve this purpose?

 

I really don't know how much juice it would need. The USB would provide 500mA max.

 

Well finally found the time to do some tests. Bottom line is the MPV5K003 inverter is NOT working with 5920G's signals. I traced the problem to the ENA signal level. When original inverter of 5920G is used, it goes to ON state and light is also ON when ENA signal goes to 2.7V. Switched to MPV5K003 inverter and the ENA signal reaches just the 1 volt. I think the whole panel's ENA signal goes down as the (not backlighted) panel is responding slowly in changes. The DIM signal never gets more than 0 volts when original inverter at max brightness is 3.12v.

 

Thank you for your thorough explanation! Now we have two options - run it on single lamp, like we are currently doing; or waste more money on other slim 2 CCFL inverters with somewhat friendly connector and hope for the best. I choose the first option, sorry.

 

Does anyone know the difference from +5VALW and +5VS?

 

You wont like the answer. There is a nice little schematic going from +5VALW to +5VS. Google 3361P and on page 31 you'll find your answer. Basically 5VALW is always on power rail, while 5VS is switched power rail.

 

That is what I thought. So electrically it would be safe. Just might be switched off. I cannot find a+5ALW place to connect to on my MB, but when I get the cable on Friday I will try to hook the +5VALW from the led panel to the +5VS and see if it works. Now VALW and VS make sense. "Voltage Always", being that VA is already taken and VS "Voltage Switched".

 

Well... I managed to fry my old Dell Vostro 1520 trying to put a higher resolution screen in it. I do not think there is a high enough voltage running in the laptop that allows me to hook up this screen. :cry:

 

Sad news Which display you've tried? Ordinary display should work just fine, assuming you have arranged the wires correctly. The RGB LED is another story.

 

I was trying the LTN154CT04 up from the LTN154AT12. Both of which are RGB LEDs. I get no power at all on the MB. I think I messed up and let two joints touch.

 

Sorry but the only thing in common between those two panels is that they are Samsung. The first one is WUXGA (1920x1200) RGB LED, 50 pin; the second is WXGA (1280x800) WLED, 30 pin. They are miles apart.

 

I think I am just going to scrap everything on this laptop and start with a fresh one. The only thing I am going to save is going to be the SSD.

 

Hello,

I've compared 5930g schematics to 5920g, afaiu 5930g has dual-lvds as well, thus can handle higher res displays. My idea is to utilize a matte 1920x1200 display, maybe also put a resistive touchscreen on top of it (and connect to internal mpcie-usb adapter, obviously). What display do you recommend?

 

LP154WU2-TLA2. It's dual lamp, but you can run it on a single, so no worries, and the colors would still look stunning

 

triturbo, thanks for the answer.

p.s. out of curiosity, you have M4 in msata-sata caddy and 7k1000 in ide optidrive. right?

 

Yes. It's actually 240GB M500 mSATA now. Maybe I'll try to mod mPCIe slot to act like mSATA, but it wont be until next month.

 

triturbo, this is very offtopic, but you don't have a dedicated thread for your mods on this forum, so here goes.

1. Isn't it possible to add msata without sacrificing mpcie? Msata ssd takes very little place anyway...
2. Your chipset supports up to 3 SATA ports. But BIOS...

 

Sure, if you want to deal with all the wiring. I don't see a point, since for 6-and-something years, I'm yet to use the second mPCIe slot.

Chipset support is one thing, actually having all the lines wired is another. Same goes to everything as well as the LVDS (not completely off-topic ). What I'm trying to say is that only 2 SATA lines can be found across the MoBo, the 3rd is left unconnected. As for BIOS, when the time comes, we shall see It wont be the first time that I'll shoot in the dark, so no worries

 

Not sure if anyone is still interested in this, but I have successfully upgraded my spare 5920G to LP154WU2-TLA2 (72% NTSC, WUXGA), running fine on a single lamp. Used 7720G LVDS cable, which was rewired accordingly. Would transfer it to my main 5920G later this year (not with me at the moment).

 

Hello to all modding enthusiasts! I'm going to try to mod my 5920G cable to see if I can make it support a WSXGA+ (1680x1050) display. Can someone tell me if it's possible just adding this 8 wires?

Thank you to all, especially triturbo for make all of this possible!

 

As I said above, I'm running WUXGA (1920x1200) just fine. So yes, adding those wires is exactly what you need. This, or rewiring 7720G cable, what I did. Whatever suits you best. Good luck!

 

Thanks for you answer triturbo. I've killed my motherboard, but as soon I revive it i'm going to do that. I bought a Toshiba L500 and it has a CCFL 15.6" LCD, and I've been wondering, I have a spare 17" CCFL LCD, could I ever perform the same cable re-arrangement in this LCD Panel?

Thanks!!

 

You can, but I don't see the point, since it wont be a laptop anymore.

 

Yes, you are right. But that doesnt matter because I'm only using it on my desk.

now I just need to find compatible schematics to perform the mod on the flat cable for this model.

Thank you so much triturbo!

 

Can you send me the scheme for rewiring 7720g cable pin to pin?

 

Well the best I can do right now is to tell you this - search for "Compal LA-3551P", on page 18 is the LVDS connector, compare it to what I have posted on page 2 of this topic. Use the inverter part from your 5920G cable, because the 7720G one wont fit. Good luck!

 

Ok thanks ,
And this screen will work?
LP154WU1-TLC2 (TL) (C2)
Because have one lamp connector same as normal 5920g screen

 

It's really not the best one you could get, but if it suits your price range and needs (not color accurate!), then you should be fine. Again as with all laptop upgrades I can't guarantee 100% that it would work, since it could be a proprietary model for DELL for example. As I confirmed numerous times, dual lamps are not a problem, but again, whatever suits you best. Good luck!

 

thanks the screen upgrade worked

 

Glad that it worked. Enjoy!

 

your new display is LP154WU1-TLC2?

 

Hello everybody,
Do you have something notes about models that is confirmed it works?

 

LP154WU2-TLA2 works fine on single lamp. That's with the cable mod of course. Colors are good, viewing angles are good too, overall pretty nice display. Short of the RGB LED in M4400, this is the best 15.4" display you can get.

 

@triturbo thank you for quick reply,
about the LVDS cable, which must be rewired, we can take it only from 7720G?

 

There are not many Acers with 2ch LVDS, so the 7720G comes as a more widespread (easier access to parts) option.

 

you right, is not so hard to find cable from 7720, because there are many (that are broken).
Will be difficult to obtain LP154WU2-TLA2, in your opinion can I try with N154Z1-LO1 (is posible to get this model from a friend)

 

Ask the sellers for exact part number. The one you mention is WSXGA+ (1680×1050), and not high on color, so it's your call, I just gave you which is the best compatible option. It is fine for a test and if you find that it covers your needs, who am I to tell you otherwise Happy modding and enjoy.

 

If will use the LVSD cable from 7720,
Exist any possibility to keep inverter part (the reason is to don't destroy original cable from 5920), also change the inverter (put one from 7720, or one that fits with conector) ?

 

Don't forget to rewire it!
You probably can use the 7720G's inverter but they usually work differently according to the machine they are used in. So it's best to use the inverter that came with the machine. I tried to run a Sony 2CCFL inverter, in the end it turned out that the voltages it expects in order to work properly are different than what 5920G supplied and yes everything was wired correctly. You can give the 7720G's inverter a go, but you'll most likely need the 5920G's one.

 

So, I will use the inverter from 5920
I ordered both LVDS cables (7720 and 5920g), i found 2 at price for one
Already i have the display that I mentioned before, and next week when the cable arrives to me, I hope to start project.
If rewiring is successful, I will listen to your advice about screen (display model) LP154WU2-TLA2
...
Exist any risk during testing, in case the cable are wrong fixed?
I rely on you to be here when I will make rewiring.

 

As I said earlier in the topic double or even triple check which wire goes where. A fried display and/or motherboard might be the outcome otherwise. My pin-out is spot on, it is the one I used for my mod.