M4800 Owner's Thread

Hi there. I want to compare two FullHD IPS screens use in Dell M4800 model. One screen is AU Optronics, another is LG.

Before we start I want to apologize for my English.
I know, the M4800 model is old enough and is no more available in new condition in past years. You can buy used M4800 from ebay, so its condition could be in range from "open box" to "for parts or trash".

Unfortunately I have no colorimeter or any professional experience in screen reviewing. But... I have my eyes, some knowledge and a creepy camera on my mobile. I saw both screens, I tried to reproduce a view from my eyes on the photos, but I'm telling on my subjective opinion.
So, maybe someone will find this interesting, or if you're planning to buy used Dell M4800, you will know, which screen to choose. Let's begin. I have two laptops, mine and not mine.

Mine laptop has AU Optronics screen, Dell P/N 4WVJT, Manufacturer P/N B156HAN01.1 (AUO11ED).
Its specs are here.

Another laptop has LG screen, Dell P/N 3874Y, Manufacturer P/N LP156WF6-SPB1 (LGD046F).
Its specs are here.

Spoiler: AIDA64 screen information.

Spoiler: Color Reproduction Comparison

Red color looks a bit more natural on AUO screen. LG's red looks like it was mixed with orange a bit.



Green on AUO looks more calm, not so saturated. On LG green looks like it was mixed with yellow a bit.



Blue looks on AUO more calm, not so saturated. Generally it was hard to see any difference. I think, that's because the blue is aggressive for our eyes.



Yellow on AUO is more clean and good reproduced IMO. Yellow on LG looks like it was mixed with orange.



White is "white" on AUO, more clean. Warm a bit. Looks like 6500K color temp or close to it. LG's white looks reddish, like the white color was mixed with the red or pink. As I know, many LG panels suffer from reddish white.



50% gray looks almost the same as the white on both panels. Just the brightness reduced, you can see it, because the keyboard backlight is more bright.



Black is awful on both panels because of IPS GLOW. But I can say I like LG's black, which looks less colorished (because of glow) and more uniform. BUT! If I try to compare just blacks, the AUO black looks more black, whereas LG's black looks like it has some violet color. Anyway, the blacks are not so different, when you look at them in real. They're both suck on IPS.



Finally, the multicolor photo. I don't know, how I can comment the photo, but it looks like AUO has wider color range? (I saw some info, that AUO panel has 91-92% sRGB and LG panel has 82-83% sRGB, but I don't sure I'm telling about this on the photo.)



I like AUO colors more. I guess, the AUO panel reproduce colors more accurate, they look not so saturated sometimes, but more realistic, more clean. I heard this opinion before. AUO wins.

You can find the photos also here.

Spoiler: Backlight bleeding

I see no major or even minor backlight bleeding on the LG panel. LG does good work.



With AUO panel we have more problems with backlight. These bleedings are easy to detect.







This is the biggest disappointment in AUO panel. And these bleedings weren't the result of poor assembling. I like LG backlight is NOT bleeding in this test. LG wins.

You can find the photos here.

Spoiler: Backlight brightness and PWM

I counted 16 levels of brightness adjustment on both machines under Windows 7 with no special Dell drivers.
I set my mobile camera to manual mode, so you can compare both the photos on max and min brightness.





Well, we have some stripes on AUO screen with min brightness. Let's see if AUO can hurt our eyes.



No any stripes with these settings of camera. I guess, the PWM frequency is much higher than 100-200 Hz. I think, there is no reason for concern. Your brain will not noticed about flickering on minimal brightness. Let's see for fun more of AUO flickering. Just set another setting of camera.
1/16 brightness level (where 1/16 - min brightness, 16/16 - max brightness).



2/16 brightness level. Still flickering.



3/16 brightness level. Still flickering.



4/16 brightness level. No flickering.



Well, the AUO panel is no more flickers in mid and high ranges of brightness. Also, the minimal brighness is really low, so I think, you will not use your laptop somewhere somehow with so low brightness. Anyway, the winning is LG panel, no any PWM in all the brightness range.

You can find the photos here.

Spoiler: GLOW

That's a hurt of almost all IPS panels. But it is what it is. Glow looks more colored on AUO panel, you lust look at the photos. AUO's GLOW is so colorished, so cheerful.

























I guess, LG has better version of GLOW. I guess, LG wins.

The photos are here.

Spoiler: Reflections and antiglare

Both the panels have antiglare coating. Which one is better?







AUO looks more matte, whereas LG looks more glossy. In test of antiglare AUO wins.

The photos are here.

Spoiler: Text

When I work with text on both panels, sometimes AUO looks like it has just a BIT noticed crystal effect or grain. I said - a bit, I know, it is very subjective. It looks like the white fields are starting sparkle, but it's really hard to notice for me.











I really have no macro lens, so everything I can do is just these photos. I don't even know what to say, they look the same. Or similar. I noticed one thing, maybe because of more clean and neutral white, maybe because of coating, but for my eyes the AUO panel is more comfortable, when I read a text. I guess, AUO wins in this test.

The photos with text are here.

Finally. I can say, I like AUO because of more real colors, but, remind, it's my opinion, I have no colorimeter. I like LG because of minimal backlight bleeding and more perfect GLOW (imo). Thanks for reading. While I have both laptops, you can ask me to test something.

 

Nice info, I have the LG screen on mine and I like it very much, but it don't seem to be the same as yours.
Model number: LG Philips LP156WFC (Dell DC9YJ).
Yours has the eDP connector while mine have the older LVDS 40 pin
http://www.panelook.com/LP156WFC-TLB1_LG Display_15.6_LCM_overview_18458.html
http://www.panelook.com/LP156WF6-SPB1_LG Display_15.6_LCM_overview_24180.html

I actually thought it was an ips panel for the first minutes I started the computer after arriving....the viewing angles are very good for a normal tn panel..the colors can be a little to much towards the magenta and your pictures confirm this even if it is a slightly different model.
One issue I have had with this screen is that there has been two rectangular specs of dust behind the polariser.
I think the first time a dust particle came into the screen somehow when I was baking, I was using the computer to read the recipe like I usually do with my laptops and it got some flour on it.
There was no way to flick it away other than smacking the screen with my index finger that caused it to jump down a little, and I just smacked the screen until it exited the visible area of the screen on the bottom edge..
It happened again a few months later and I smacked the screen and it did disapear to the right.
Its a little scary when there is something on the screen that is inside the screen and I can't remove it and it annoys the crap out of me.

Now I actually had two M4800's just last week as I ordered one to a close friend of mine to be used as a work computer for CAD and BIM work on a limited budget with the criteria of a metal chassis, good cooling, easy to clean the fans and technical support from my end including remote access so it was easiest to buy one that I used myself so I could use the same W10 macrium image and be done in hours configuring all the software that the machine is being deployed for, but I did not look at which screen it had, but I guess it had the same screen as it was dated around the same era as my M4800 and the screen colors looked almost identical.
I did have it teared down to bits, cleaned and modified with new Thermal grizzly thermal paste and 2mm thermal pads because 1,5mm is out of order with all manufactures but it worked out fine just as I mentioned in the other thread
Precision M4800 CPU upgrade, TDP concerns
The screen is the only component I left alone

 

Yes, the TN panels are good in M4800. I had one M4700 with Samsung TN panel before buying M4800 and still have another M4700 with one of the best TN panels AUO B156HW01 v.4. Both panels look very good for laptops and for everyday work. Only professional photo editing could cause some problems because the TN panels change shades of colors with changing viewing angle.
As far as I know, all the M4800's that was made up to 2014, have TN panels and LVDS connector. And some laptops since 2015 have IPS screen with eDP connector. There is one reliable method to know, which panel has M4800. You just have to know Dell Service Tag from bottom cover or from bios. Check the "system configuration" tab with that service tag on dell support site. You need to find a component with the display. For example, it looks like 39.6cm (15.6") UltraSharp FHD( 1920x1080) Wide View Anti-Glar e LED-backlit Premium Panel Guarantee. Then copy part number of the display and go to parts-people site. Next check this part number on this site to find out, what Manufacturer PN has the panel. For example LP156WFC TL B1. Then go on panelook and find this panel with manufacturer pn and get almost full info about the panel.

I also try out Dell Wireless 1550 and Intel Wireless 7260. I alternately put both laptops on the same place and try to find wifi networks and measure internet speed with speedtest.net. My router is Mikrotik RB951Ui-2HnD. I found out that the Dell Card has more stable and faster speed, after few measurings I got almost identical results like 90/83 Mbps. With Intel Card I got slightly different results, but in general it was 85/70 Mbps. Yes, from several tries I didn't get upload speed with intel card more than 70 Mbps, whereas dell card gave always over 80 Mbps. Also dell card had worse signal strength and found less number of wifi networks.

Gonna test fans. My M4800 got both AVC fans, and I'm going to run stress test few times. Then I will replace both my fans with another M4800 fans, the other one has both Delta fans. And run stress test again. Then compare the results.

 

Finally compared both AVC and Delta fans. No big difference.
I launched AIDA64 stress test for 15 minutes, then made snapshot. Next I reset the statistics and made second snapshot after 5 minutes (CLS - CLear Statistics).

https://imgur.com/cJCYvAz

Spoiler: Temperatures, picture

CPU: Delta fan is better a bit.
GPU: AVC fan is better a bit.

What about construction?

https://imgur.com/fAnBpa8

Spoiler: AVC vs. Delta, picture

Spoiler: Inscriptions on the fans, text

Inscriptions on the Delta fans.

Delta GPU fan (small):
Delta Electronics Inc. Made in China
DC BRUSHLESS MODEL KSB0605HC
DC5V 0.45A 8.5 CFM

Delta CPU fan (big):
Delta Electronics Inc. Made in China
DC BRUSHLESS MODEL KSB0705HC
DC05V 0.60A 11.8 CFM

Inscriptions on the AVC fans.

AVC GPU fan (small):
MODEL BATA0715R5M
DC 5V 0.3A 4.3 CFM
HYDRAULIC BEARING

AVC CPU fan (big):
MODEL BATA0815R5H
DC 5V 0.3A 4.5 CFM
HYDRAULIC BEARING

So weird for AVC, especially big one for CPU to having only 4.5 CFM, while Delta CPU has 11.8 CFM.
It looks like AVC didn't even care what to write on their production. Just look at this link (thanks to unnoticed):
https://www.ebay.com/itm/DELL-Preci...-Big-CPU-Cooling-Fan-DC28000DDV0/272399659332

MODEL BATA0815R5H
DC 5V 0.3A 12.5 CFM
HYDRAULIC BEARING

Same model with different parameters. What the hell, AVC?

Design features.
Delta CPU big fan and AVC CPU big fan both have a ring (dunno what it's called) that connects the blades. That's good because of less chance of breakage.
AVC CPU big fan has sharp edges. I am not an expert in aerodynamics, but it seems to me that it can produce extra noise.
AVC CPU fan has 23 blades, Delta CPU fan has 31 blades.
AVC CPU fan has hydraulic bearing (from inscription on the fan), Delta CPU fan has sleeve bearing (from datasheet).

https://imgur.com/vrbG2oY
https://imgur.com/ayDFFCN

Spoiler: AVC vs. Delta CPU fans, pictures

AVC GPU small fan has a ring that connects the blades. That's good because of less chance of breakage. Delta GPU small fan doesn't have the ring.
AVC GPU small fan has sharp edges. I am not an expert in aerodynamics, but it seems to me that it can produce extra noise.
AVC GPU fan and Delta GPU fan both have 17 blades.
AVC GPU fan has hydraulic bearing (from inscription on the fan), Delta GPU fan has sleeve bearing (from datasheet).
And last. AVC GPU fan has paper-based laminate (AFAIK called "getinax") for schematic, Delta GPU fan has fiberglass laminate. Fiberglass laminate is much better, even if it's redundant here.

https://imgur.com/MvSn4S7
https://imgur.com/lNGkCpo
https://imgur.com/Zo3i4El

Spoiler: AVC vs. Delta GPU fans, pictures

I tried to test all the fans on their max speed. I plugged all of them to power supply. I did stupid, thought they all work from 12V DC, just forgot that they use 5V. So... Good bye, small AVC GPU, R.I.P. Burned out.
But I have tested Delta GPU and both AVC and Delta CPU fans. I can't compare Delta GPU to AVC GPU because last one is dead now. But I compared noise level and airflow from both AVC and Delta CPU fans.

Airflow looks the same, without special tools I can't say, which one is better, they really look almost identical. But noise level on max speed is more comfortable with Delta CPU fan. Delta's noise is more high frequency (an usual sound from many laptops), AVC's noise is more loud and mid frequency. I prefer Delta. Sadly I can't compare Delta and AVC small GPU fans, but I'm gonna buy another one and then compare.

 

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Does anyone have an M4800 with the AMD firepro M5100?
Is your computer working fine with the AMD card and Windows 10?, is it stable?
Does switchable graphics work?

I have some issues with my gpu and thinking of replacing it but there seems to be a shortage of documentation when Windows 10 was released.
Same on HP and Dell and no official info, if I choose windows 10 on M4800 driver page the AMD driver is not visible, but if I choose Windows 7 the AMD driver appears again.

Description says:
This package provides the AMD FirePro M5100/M6100 Graphics Driver that is supported on Mobile Precision Workstations M4800/M6800 running the following Operating Systems: Windows 7 and Windows10.

https://www.dell.com/support/home/us/en/04/drivers/driversdetails?driverid=kyp6r

So Its a little confusing to find the driver



Edit:
I received the Delta gpu fan, just installed it after cleaning it and lubricating before assembling it.
It is way quiter than the AVC fan that sounds like its grinding, classic AVC hollow plastic sound that all AVC fans has, they like an echo or high tone cling when you smack you finger on any AVC fan.
Similar sound to when you smack a sheet of polystyrene plastic.

Now this Delta fan matches the sound harmonics of the other Delta cpu fan.
They are perfectly tuned to cancel each other out.
The gpu fan only has a slight louder wining noise but that is due to that the diameter of the fan is smaller plus less impellers, its a bit advanced to explain if you don't understand the subject.

As I mentioned before, the ads are wrong.
They are opposite to what they should be named.
The ad for the cpu fan is actually a gpu fan, and vice versa the cpu fan is actually the gpu fan.
I tried to tell the seller this but I guess the translating did not work out I guess, I think they use translate to communicate in english when answering PM's.
I ordered one cpu fan by just looking at the image and I did indeed receive a delta gpu fan.
Now I ordered a second one because I have two M4800's as I didn't want to have two parts laying around if its the wrong part so I just ordered one first as a test.

Link to listing on Aliexpress:
https://www.aliexpress.com/item/Gen...C28000DEDL-8-5CFM-DC5V-0-45A/32848373671.html

 

Hello guys,

New M4800 owner here. Recently got one from work and I am enjoying it so far. Good specs and lots of RAM.

I would like to upgrade the monitor to an 1920×1080 screen. The one I have is currently 1366x768 and the display is dreadful. I read that it is possible - I'm going to check if I have a 30 pin or 40 pin and you need to know the type of cable as well?

Anything else I need to know about?

Thanks

SM

 

Just use Aida64 and go to screen panel and google the part number and it will tell you if its an LVDS or eDP, so you don't have to tear down the whole computer to look up a part number

http://www.panelook.com/ is the most detailed website out there

 

Thank you! - when I get home from work ill take a look

 

I looked up the part number LTN156AT32-201
Panelook doesnt have the exact model but all the LTN156AT32 variants all use LVDS its so its highly likely

https://www.laptopscreen.com/English/model/Dell/PRECISION~M4800/

They have a 40pin FHD display. Would it be likely it is LVDS as well? since its not touch screen display or QHD


Thanks,

SM