decoder board or HP 8770w dump file search

You can’t make 8560W display 300 nits as its panel is limited to 210nits no matter what dump file is written on the decoder board.

 

yes yes yes, i'm know...
8740w - I looked at the specifications of Dreamcolor in your 8740w, there are 210 nits .. it is unlikely to help ...I don't mind getting a 24c32 dump( thank ) but anyway - thanks.

that is, the adjustment does not occur in two chips (25c32 and w25x32), but only at the level of the STDP 8028 chip? sad =(

By the way, in addition to two HDDs of 2 terabytes, do you have 2 more SSDs, the first is mSATA and the second is installed where? where was the DVD drive before or where? I have a question about this - speed on mSATA and other SSD 2.5 is not cut?

 

I have one 512GB system SSD, 1TB mSata, 2TB HDD in the second HDD bay, one 2TB on the place of the DVD optical bay and one 2TB in the advanced docking station.
The speed of mSata, optical bay and advanced docking station is limited to SATA II whereas the two main HDD’s bays are SATA III.

 

thanks.
necessary information!

 

Here you go:
HP Colormapping board A02, Elitebook 8740w DC2 - U4 - Catalyst (CSI) CAT24C32W1.bin

Spoiler: HP Colormapping board A02, Elitebook 8740w DC2 - 01 - front

Spoiler: HP Colormapping board A02, Elitebook 8740w DC2 - 02 - back

Spoiler: HP Colormapping board A02, Elitebook 8740w DC2 - 03 - eeprom location

Spoiler: U4 - the interesting bit

Code:

Offset(h) 00 01 02 03 04 05 06 07 08 09 0A 0B 0C 0D 0E 0F

00000720  01 01 01 00 9A FF FF FF FF 1E 50 1C FF FF FF FF  ....šÿÿÿÿ.P.ÿÿÿÿ
00000730  FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF  ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ
00000740  FF FF FF FF FF FF FF FF FF FF FF FF FF 01 01 50  ÿÿÿÿÿÿÿÿÿÿÿÿÿ..P
00000750  1C 46 55 4C 4C 2F 4E 41 54 49 56 45 00 00 00 00  .FULL/NATIVE....
00000760  00 CC 00 52 43 00 00 A0 3E 89 41 A8 3E B0 72 2F  .Ì.RC.. >‰A¨>°r/
00000770  3F B2 9D 9D 3E 2D B2 52 3E AA F1 37 3F 3D 0A 14  ?²..>-²R>ªñ7?=..
00000780  3E E1 7A 38 3D EC 51 0C 40 CD CC 00 00 00 00 80  >áz8=ìQ.@ÍÌ....€
00000790  3F 00 00 00 00 00 00 00 00 00 00 FF FF 00 00 E8  ?..........ÿÿ..è
000007A0  03 00 80 00 00 73 01 01 50 1C 41 64 6F 62 65 52  ..€..s..P.AdobeR
000007B0  47 42 20 20 20 20 00 00 00 00 CC 00 52 43 00 00  GB    ....Ì.RC..
000007C0  A0 3E 89 41 A8 3E B0 72 23 3F 0A D7 A8 3E C3 F5   >‰A¨>°r#?.ר>Ãõ
000007D0  57 3E 3D 0A 35 3F 8F C2 19 3E 9A 99 75 3D 8F C2  W>=.5?.Â.>š™u=.Â
000007E0  0C 40 CD CC 00 00 00 00 80 3F 00 00 00 00 00 00  .@ÍÌ....€?......
000007F0  00 00 00 00 FF FF 00 00 E8 03 00 80 00 00 D1 81  ....ÿÿ..è..€..Ñ.
00000800  02 50 1C 55 73 65 72 20 73 52 47 42 20 20 20 20  .P.User sRGB 
00000810  20 20 20 00 00 47 43 00 00 A0 3E 89 41 A8 3E B0     ..GC.. >‰A¨>°
00000820  72 23 3F 0A D7 A8 3E C3 F5 99 3E 9A 99 19 3F 9A  r#?.ר>Ãõ™>š™.?š
00000830  99 19 3E 9A 99 75 3D 8F C2 0C 40 CD CC 25 3D E6  ™.>š™u=.Â.@ÍÌ%=æ
00000840  AE 4E 41 52 B8 61 3D AE 47 61 3D AE 47 FF FF 00  ®NAR¸a=®Ga=®Gÿÿ.
00000850  00 4F 1C 79 80 00 00 15 01 01 50 1C 52 65 63 2E  .O.y€.....P.Rec.
00000860  36 30 31 20 28 53 4D 50 54 45 29 20 20 00 F0 42  601 (SMPTE)  .ðB
00000870  00 00 A0 3E 89 41 A8 3E B0 72 21 3F AE 47 AE 3E  .. >‰A¨>°r!?®G®>
00000880  7B 14 9E 3E 52 B8 18 3F EC 51 1E 3E 52 B8 8F 3D  {.ž>R¸.?ìQ.>R¸.=
00000890  29 5C 19 40 9A 99 00 00 00 00 80 3F 00 00 00 00  )\.@š™....€?....
000008A0  00 00 00 00 00 00 FF FF 00 00 E8 03 00 80 00 00  ......ÿÿ..è..€..
000008B0  1E 01 01 50 1C 52 65 63 2E 37 30 39 20 20 20 20  ...P.Rec.709 
000008C0  20 00 00 00 00 CC 00 F0 42 00 00 A0 3E 89 41 A8   ....Ì.ðB.. >‰A¨
000008D0  3E B0 72 23 3F 0A D7 A8 3E C3 F5 99 3E 9A 99 19  >°r#?.ר>Ãõ™>š™.
000008E0  3F 9A 99 19 3E 9A 99 75 3D 8F C2 19 40 9A 99 00  ?š™.>š™u=.Â.@š™.
000008F0  00 00 00 80 3F 00 00 00 00 00 00 00 00 00 00 FF  ...€?..........ÿ
00000900  FF 00 00 E8 03 00 80 00 00 5B 01 01 50 1C 44 43  ÿ..è..€..[..P.DC
00000910  49 2D 50 33 20 45 6D 75 6C 61 74 69 6F 6E 00 00  I-P3 Emulation..
00000920  40 42 00 00 A0 3E 9C C4 B3 3E 46 B6 2C 3F CD CC  @B.. >œÄ³>F¶,?ÍÌ
00000930  A2 3E D3 4D 85 3E CB A1 2E 3F 7B 14 19 3E 9A 99  ¢>ÓM…>Ë¡.?{..>š™
00000940  75 3D 8F C2 26 40 66 66 00 00 00 00 80 3F 00 00  u=.Â&@ff....€?..
00000950  00 00 00 00 00 00 00 00 FF FF 00 00 E8 03 00 80  ........ÿÿ..è..€
00000960  00 00 7F 01 01 50 1C 4E 61 74 69 76 65 2F 55 73  .....P.Native/Us
00000970  65 72 00 00 00 00 00 CC 00 52 43 00 00 A0 3E 89  er.....Ì.RC.. >‰
00000980  41 A8 3E B0 72 2F 3F B2 9D 9D 3E 2D B2 52 3E AA  A¨>°r/?²..>-²R>ª
00000990  F1 37 3F 3D 0A 14 3E E1 7A 38 3D EC 51 0C 40 CD  ñ7?=..>áz8=ìQ.@Í
000009A0  CC 00 00 00 00 80 3F 00 00 00 00 00 00 00 00 00  Ì....€?.........
000009B0  00 FF FF 00 00 E8 03 00 80 00 00 7F FF FF FF FF  .ÿÿ..è..€...ÿÿÿÿ

Screen brightness is determined by the specific LED strip used for the backlight. For the LP171WU8-SLB1 that happens to be 210 cm/m². A way around that would to to replace the strip with one that has brighter leds. However, the Dreamcolors use RGB leds rather than white leds, such as this example. Even if you can find a compatible one then replacing them is still a pain, but it is a theoretical possibility.

There might be another way out. The SLB1 backlight connector suggests there's two possible methods to drive brightness control:

Spoiler: LP171WU8-SLB1 (Dreamcolor, RGB Led, 10-bit), backlight connector

The description is a bit ambiguous; do they mean you can drive the pwm signal by sending either pwm or a stepless voltage difference (0-3.3V) or do they mean you can drive the panel either with pwm or directly by voltage control?

Fans are similar; they're either 4/5-pin (pwm) or 3-pin (voltage). But even the 3-pin fans usually have a pwm option on their pcb, it's just that it doesn't have a wire soldered to it. Voltage control was how all panel backlights used to be controlled, pwm being a later introduction.

You could find out by cutting the pin #18 wire and hooking it up to a small 0-5V buck converter such as those used for small diy fans. With a bit of luck it will accept >3.3V and it'd permit 'overclocking' the RGB led strip. Backlight longevity is limited by the amount of light it's putting out, so expect a somewhat diminished lifetime in return.

 

Hello!
Interesting topic! My 8560w DC2 can't go higher 210nits and I'm able to see PWM backlight at 100% brightness. It seems LCD backlight is limited. I also have Dell M6700 with Premiercolor display and it is so much brighter with no visible PWM at 100%.
I also tried flashing dump from my comrade Love is 8770w with no result.
Here is my HP 8560w RGB converter dumps from both flash chip 25L32 and EEPROM 24C32 - GDrive
Ver 113:

Spoiler: screenshot