SD init fail issue in 2004 lcd

[Pac333]

Hello, my mks sgen l v2 board can't connect to the sd card
I am using lcd2004 and I modified the firmware by looking at other issues before, but it is not recognized.

configuration.h ->
#define SDSUPPORT
#define REPRAP_DISCOUNT_SMART_CONTROLLER

configuration_adv.h ->
#define SDCARD_CONNECTION LCD
(This is the same result as enable/disable)

pins_MKS_SGEN_L_V2.h->
#define SDCARD_CONNECTION LCD

I've replaced all the short cables and long cables. But still sd init fail.

[mks-viva]

Hi! Can you provide your firmware to me and i will test it?

[Pac333]

This is the firmware file I uploaded
firm.zip

[mks-viva]

You need remove board's TF card, because LCD's SD and board‘s TF card use SD_DET signl is the same

[Pac333]

Of course, I also referred to the previous issue.
but sd init fail continuously

[mks-viva]

This issues and i test it is ok

[Pac333]

Is my firmware ok..?
I couldn't sleep all night because of this problem.
The only way left is to replace the lcd with a new one...🥲

[mks-viva]

Yes, i test it is ok, you need remove Board's Tf card

[Pac333]

After removing the board tf card, eeprom initialization proceeds, and the sd card of the lcd is recognized!

I have other problems, can I solve them?

1. A long beep sounds for the printer boot and the power is turned on.
2. The extruder fan (not a hotend fan) works the first time the power is turned on, but stops working when entering the main menu -> It does not work even during printing.

[mks-viva]

About your other problems

1. This is normal
2. You need to define its function by yourself, for example, it will be turned on when the heating head temperature reaches

[Pac333]

The buzzer was capped to reduce noise
The extruder fan was connected to the E1 terminal, not the regular power terminal.
All problems have been resolved, thank you :)