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Model # APC IV Official NEC computer

Here are the diagrams and repair parts for Official NEC APC-IV computer, as well as links to manuals and error code tables, if available.

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  • In the search box below, enter all or part of the part number or the part’s name.

Not all parts are shown on the diagrams—those parts are labeled NI, for “not illustrated”.

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For DIY troubleshooting advice and repair guides, visit our repair help section.

Model diagram and schematic

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512-kb Memory Expansion Board (g9yap) Apc-h450 136-005873-001-A

#NI

All parts diagram

512-kb memory expansion board (g9yap) apc-h450

Part #136-005873-001-A

The manufacturer no longer makes this part, and there's no substitute part

Speaker 808-868279-001-A
#9

Replacement parts diagram

Speaker

Part #808-868279-001-A

The manufacturer no longer makes this part, and there's no substitute part

Apc-h223e 5 1/4-inch 80-mb Hard Disk 136-007897-218-A
#13

Replacement parts diagram

Apc-h223e 5 1/4-inch 80-mb hard disk

Part #136-007897-218-A

The manufacturer no longer makes this part, and there's no substitute part

Hard Disk Drive Rail 136-777372-002-A

#NI

All parts diagram

Hard disk drive rail

Part #136-777372-002-A

The manufacturer no longer makes this part, and there's no substitute part

5 1/4-inch 40-mb Hard Disk Apc-h422 136-006912-209-A
#11

Replacement parts diagram

5 1/4-inch 40-mb hard disk apc-h422

Part #136-006912-209-A

The manufacturer no longer makes this part, and there's no substitute part

Indicator Panel Assembly 136-204898-003-A
#8

Replacement parts diagram

Indicator panel assembly

Part #136-204898-003-A

The manufacturer no longer makes this part, and there's no substitute part

5-in. Hard Disk B Cable, Esdi 808-840069-019-A

#NI

All parts diagram

5-in. hard disk b cable, esdi

Part #808-840069-019-A

The manufacturer no longer makes this part, and there's no substitute part

3 1/2-in. 1.44-mb Diskette Drive Fd1137h (fits In 5 1/4-in. Slot) 136-007954-222-A
#15

Replacement parts diagram

3 1/2-in. 1.44-mb diskette drive fd1137h (fits in 5 1/4-in. slot)

Part #136-007954-222-A

The manufacturer no longer makes this part, and there's no substitute part

Flpy Dr Cbl 158-050059-008

#NI

All parts diagram

Flpy dr cbl

Part #158-050059-008

The manufacturer no longer makes this part, and there's no substitute part

3 1/2-inch 720-kb Diskette Drive Apc-h220 136-006314-220-A
#14

Replacement parts diagram

3 1/2-inch 720-kb diskette drive apc-h220

Part #136-006314-220-A

The manufacturer no longer makes this part, and there's no substitute part

Symptoms for window air conditioners

Choose a symptom to see related window air conditioner repairs.

Main causes: clogged condensate drain, air conditioner not leveled properly, leaky window air seals …

Main causes: bad compressor, lack of refrigerant, bad compressor start relay, electronic control board failure…

Main causes: turning the air conditioner off and the back on too quickly, dirty or restricted condenser coil, compressor…

Main causes: dirty air filter, air conditioner is too small for the room, temperature set too cold, control failure…

Main causes: clogged drain hole, air conditioner not leveled properly…

Main causes: lack of electrical power, bad electronic control board, wiring failure, bad temperature sensor…

Repair guides for window air conditioners

These step-by-step repair guides will help you safely fix what’s broken on your window air conditioner.

How to replace a window air conditioner ambient thermistor

How to replace a window air conditioner ambient thermistor

If your window air conditioner isn’t cooling properly, it might need a new ambient thermistor. You can replace it yourse…

Repair difficulty
Time required
 45 minutes or less
How to replace a window air conditioner user interface control board

How to replace a window air conditioner user interface control board

Control buttons or lights on the user interface control board can stop working. This repair guide shows how to replace i…

Repair difficulty
Time required
 30 minutes or less
How to replace a window air conditioner electronic control board

How to replace a window air conditioner electronic control board

The electronic control board is the brain of your window air conditioner. Here’s how to replace it.…

Repair difficulty
Time required
 45 minutes or less

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