Cannot run the build in demo problem (press 10 run)

[mkchan]

hello,

My board had a problem on the keypad (please check my previous post) and fixed by replacing U23.

Now it has other problem, the board cannot run the build in program (press 10 & run). I need to press run or step 15 times (or 16 times), the board auto run by itself.

I guess U3, U4, U5 or U6 having problem (74HCT595). I will buy replacement to fix it.

I checked the code in addresses :

ADD Content
10 48 00 90 00
11 48 00 E9 01
12 00 62 01 0A
13 08 00 00 02
14 08 0E 01 02
15 00 66 02 18
16 08 E0 01 00
17 40 18 FF 12
18 08 E0 00 01
19 40 18 FF 12
1A 00 00 00 00

Thanks

[mkchan]

Hello,

The problem was fixed by replaced 74HC595.

But found another problem, LED D21 doesn't on. (Write data 7). I will start a new post

Thanks