Solder every SMD component. Measure if 5V gets regulates to 3V3.
Solder every through-hole component. Measure for shorts between any of the signal pins on the tiny 1.27 header J1, correct if needed.
Clean the PCB.
Header on adapter (J2, J3, J4, J5 column) ➔ pin number on EXT connector (EXT column) ➔ FPGA pin when using EXTx (EXT1, EXT2, EXT3, EXT4 column) connector on FPGA board.
| J2 | EXT | EXT1 | EXT2 | EXT3 | EXT4 |
|---|---|---|---|---|---|
| 1 | 14 | A7 | K12 | D15 | M5 |
| 2 | 18 | D8 | L13 | F14 | M4 |
| 3 | 22 | F7 | L12 | D16 | N3 |
| 4 | 26 | F9 | M13 | E16 | M3 |
| 7 | 12 | C7 | M16 | F11 | R1 |
| 8 | 16 | B8 | L14 | F12 | P2 |
| 9 | 20 | B9 | N16 | G12 | P1 |
| 10 | 24 | C8 | M14 | G13 | L5 |
| J3 | EXT | EXT1 | EXT2 | EXT3 | EXT4 |
|---|---|---|---|---|---|
| 1 | 21 | A16 | E6 | K16 | N12 |
| 2 | 17 | E11 | A5 | J15 | M11 |
| 3 | 13 | B14 | A6 | K13 | E13 |
| 4 | 9 | B15 | C6 | J11 | F13 |
| 7 | 19 | C13 | B5 | K15 | T13 |
| 8 | 15 | C12 | D6 | K14 | D14 |
| 9 | 11 | D13 | D7 | L16 | B16 |
| 10 | 7 | C14 | B6 | M15 | C16 |
| J4 | EXT | EXT1 | EXT2 | EXT3 | EXT4 |
|---|---|---|---|---|---|
| 1 | 35 | B10 | B3 | H16 | L1 |
| 2 | 31 | D11 | C5 | H13 | K3 |
| 3 | 27 | E10 | D5 | J13 | J1 |
| 4 | 23 | A15 | B4 | J14 | M12 |
| 7 | 37 | B11 | D4 | H14 | K4 |
| 8 | 33 | B12 | C4 | H11 | L4 |
| 9 | 29 | C11 | A1 | J16 | K1 |
| 10 | 25 | B13 | A2 | J12 | R16 |
| J5 | EXT | EXT1 | EXT2 | EXT3 | EXT4 |
|---|---|---|---|---|---|
| 1 | 28 | A9 | P16 | G14 | M6 |
| 2 | 32 | E9 | P14 | G11 | L7 |
| 3 | 36 | D10 | R14 | G10 | K5 |
| 4 | 40 | A10 | D3 | H12 | L6 |
| 7 | 30 | D9 | P15 | F15 | N2 |
| 8 | 34 | C9 | R15 | F16 | M2 |
| 9 | 38 | A11 | C3 | G15 | L3 |
| 10 | 39 | C10 | E5 | G16 | M1 |
