Dear my friends.
I have beurer PO80 - the pulse oximeter for measure SpO2 and heart rate. Afrer one time i droped to ceramic floor. The screen display come to dark and only red color display. I try to replace other OLED screen with code ssd1351 128x96 bit 39 pin. But nothing change. Screen still dark and only red.
So i think the problem come from an IC in circuit board. But i dont known what ic. Can anyone here can see the picture and give me sone advise to fix this device