Line 152: |
Line 152: |
| # The screen is shrunken to the upper/lower half of the monitor and the opposite half blacks out, | | # The screen is shrunken to the upper/lower half of the monitor and the opposite half blacks out, |
| # The upper/lower half of the screen is extended in the vertical direction. | | # The upper/lower half of the screen is extended in the vertical direction. |
| + | |
| + | ===Checker Flag Pattern=== |
| + | ====Symptoms==== |
| + | When turning on the power, you don't hear startup bong. The monitor displays the checker flag pattern. |
| + | |
| + | ====Diagnosis==== |
| + | # The most probable cause is connection troubles between the ROM-SIMM and the ROM-SIMM slot. |
| + | # Another cause is inappropriate installation of RAM-SIMMs. The memory size of RAM-SIMMs in Bank A is smaller than that in Bank B. You recently upgraded the memory but the configuration was wrong. |
| + | |
| + | ====Solutions==== |
| + | # Pull out the ROM-SIMM from the ROM-SIMM slot. Clean the ROM-SIMM and the ROM-SIMM slot with volatile cleaner or ethanol. Then connect the ROM-SIMM to the ROM-SIMM slot correctly and tightly. |
| + | # See "Principles of memory upgrade for the SE/30" in the next section, 8. Jail Bar Pattern or Smile Mac in Jail. |
| + | When you install SIMMs of different memory size, install the larger ones to Bank A and the smaller ones to Bank B. Each Bank requires a set of four SIMMs of the same memory amount. |
| + | |
| + | ===Jail Bar Pattern or Smile Mac in Jail=== |
| + | ====Symptoms==== |
| + | When you turn on the SE/30, the monitor displays vertical stripes (jail bar pattern) with/without a smile Mac. The memory was upgraded recently. The SE/30 was completely nomal before memory upgrade. |
| + | |
| + | ====Diagnosis==== |
| + | SIMMs were inserted to the wrong SIMM slots/banks. |
| + | |
| + | ====Solutions==== |
| + | * The working memory configurations for the SE/30 are shown in the table below. |
| + | * Check and re-insert the SIMMs. |
| + | |
| + | ====Note 1==== |
| + | The SE/30 has eight RAM-SIMM slots on the logic board: Four slots at Bank A and four slots at Bank B. |
| + | Principles of memory upgrade for the SE/30: |
| + | # Use 30-pin SIMMs. |
| + | # You need to install a set of four SIMMs of the same memory size to each bank. |
| + | # When you use only a single bank, use Bank A. |
| + | # When you install SIMMs of different memory size, install the larger ones to Bank A and the smaller ones to Bank B. You also have to remember that each Bank requires a set of four SIMMs of the same memory amount. |
| + | # It has been reported that some 2MB SIMMs and some 16MB SIMMs don't work for the SE/30. |
| + | |
| + | ====Note 2==== |
| + | The SE/30 has a "dirty ROM" that can recognize only 8MB RAM, and the maximum RAM for the SE/30 is 8MB under the normal condition. |
| + | But if you install the MODE32 extension file, the SE/30 can recognize up to 128MB RAM. |
| + | |
| + | ===Bright Monitor with neither Arrow Pointer nor Startup=== |
| + | ====Symptoms==== |
| + | When turning on the power, you can see bright rasters on the monitor, but neither startup bongs nor arrow pointer comes up. |
| + | |
| + | ====Diagnosis==== |
| + | * The culprit is the network filter located on the logic board at reference RP2. |
| + | * The model of the chip is Bourns 4120R-601-250/201, M/C 8908L 115-0002 or P9120M115-0006, depending on the lot, year and/or country where the logic board was made. |
| + | |
| + | ====Solutions==== |
| + | [[File:Network filter.gif|left]] |
| + | # Replace the network filter. |
| + | # This network filter chip, however, is hard to find/obtain at resale parts shops. If you have a skill to make it yourself, refer the circuit schematic of the filter as shown in the left figure. It is made of sixteen 25 ohm resistors and eight 200pF capacitors. Assemble and solder them on a small IC socket, and then solder this socket on the logic board at reference RP2. |
| | | |
| =Notes= | | =Notes= |