# Khắc phục lỗi báo đèn tím

**Hướng dẫn update firmware máy in apos 470b apos 420b**

Bước 1: tải và cài đặt tool + firmware này : <https://drive.google.com/file/d/113qk5OP\\_BP6nEE7lNgG5vilXhV\\_Dm-2Q/view>

<figure><img src="https://lh6.googleusercontent.com/cICZh0Js91aDhxcX1iIALXIwB4frhbLS5wFVbvipgDXXFIyVOKLj0025PlN0lK5dLnE0WCMhyiOEadoAiVir_aC9s7IL0e51O7SX--BL-hFu14-Tic-eWlo31xc_rIkOwGqxLpmlE7Pi6WUVP9Z-rXlzd8PCeaft7Vd2evrfo3iAKZf9mbuneitz" alt=""><figcaption></figcaption></figure>

Bước 2: Mở file đã giải nén + để ý vị trí file fimware này

<figure><img src="https://lh4.googleusercontent.com/v8hq7Fjdi8O8LZwUzIn6aB0Xi0cCgowLX2_F4B4lU8YWGgSgaiU3p_BoRP2ErjIG-0IeNegiRRZy2tW2qgcher7WuByFrq4dETs2IqKxczm6WKKHglYiBSyXabECFulrF04JVcZKjzNBB5P1r45bA8nd_N1msR1F95-radP3domjamBQOqVXp2M_" alt=""><figcaption></figcaption></figure>

Bước 3: Mở Diagnostic Tool vào các mục theo thứ tự của ảnh

<figure><img src="https://lh4.googleusercontent.com/H48gKoBUnE-oVu4dadPslYWjizxOY56OG_qdPsCA3RVa27naJokRwD4EXYz79fEZiToVigrkSWi6Mk3YG27QC8lIOpWXHjFdqstneARWWBmRrjH1keMsTO5_JrsYHRgukRMVPd5lJOzrFalLiqn0J-CWx_DPTy3pnLonSv9kyX6ZesUU1gZUuyyD" alt=""><figcaption></figcaption></figure>

Bước 4: Chọn send File => Tắt máy in đi bật lại. Và chọn thông tin theo ảnh ở dưới.

<figure><img src="/files/htFqxttWGnoWXBJSoOmY" alt=""><figcaption></figcaption></figure>

Bước 5 Chọn vào file firmware được khoanh tròn và bấm Send là ok.


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