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PowerBook 180 Capacitor Replacement Guide

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PowerBook 180c Sharp LQ9D01A LCD capacitor map (MacDat)
The driver board of the 180c's Sharp LQ9D01A display, with its nine electrolytics marked by value (MacDat)

None of the PowerBook 180, 180c or PowerBook 165c has electrolytic capacitors on its logic boards. The capacitors that age are on the display, the display power board and the trackball, and how many there are depends on the model.[1][2][3]

  • The greyscale 180's display is solid-state. Only the 47 µF capacitor on its backlight inverter and the one on the trackball are electrolytic.
  • The 180c's Sharp LQ9D01 display board carries nine surface-mount electrolytics. MacDat treats this display as "a recap on sight", working or not, because the capacitors leak and the corrosion they cause cannot be repaired.
  • The 165c's display has seven radial electrolytics, and the board with its brightness and contrast controls has two more. MacDat says these do not always fail, but can leak, and sees no harm in replacing them.[3]

The 140, 145, 160 and greyscale 165 use a different FSTN panel, covered on PowerBook 140 Capacitor Replacement Guide. The PowerBook 170 has only the inverter and trackball capacitors.

On the 165c and 180c, Apple's Service Source has two boards where the 180 has one inverter: a DC/DC converter in the base, which plugs into the interconnect board and carries the brightness control (and on the 165c the contrast control), and a DC/AC inverter in the display housing, joined to it by the converter-to-inverter cable. The parts are converter 922-0375 and inverter 922-0374 on the 165c, converter 922-0379 and inverter 922-0378 on the 180c.[4] No published list covers either DC/AC inverter or the 180c's converter; MacDat names the display as the only 180c board with capacitors to replace.[2]

Before recapping a machine that will not start or shows no picture, work through the power and video checks on PowerBook 180 Troubleshooting.

Capacitor list

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PowerBook 180, 180c and 165c capacitors (MacDat)
Model Board Value Qty Type
180 Backlight inverter (922-0024) 47 µF 16 V 1 Low-profile radial electrolytic[1]
180 Backlight inverter (922-0024) 33 µF 10 V 1 Low-profile radial solid polymer; rarely fails[1]
180c Sharp LQ9D01 display board 47 µF 16 V 4 Surface-mount electrolytic[2]
180c Sharp LQ9D01 display board 10 µF 25 V 2 Surface-mount electrolytic[2]
180c Sharp LQ9D01 display board 10 µF 16 V 3 Surface-mount electrolytic[2]
165c Display 10 µF 63 V 7 Low-profile radial electrolytic[3]
165c Board with the brightness and contrast controls 8.2 µF 80 V 2 Low-profile radial electrolytic; 10 µF 80 V substitutes[3]
165c Board with the brightness and contrast controls Not given 1 Low-profile radial polymer; rarely fails[3]
All Trackball 10 µF 16 V 1 Radial electrolytic[1][2][3]

Console5's page titled "Macintosh PowerBook 180" has a community list, read from a Sharp board, with the same nine values as MacDat's 180c list: CU1 to CU4 at 47 µF 16 V, CU5 and CU8 at 10 µF 16 V, CU7 at 10 µF 25 V, and two unnumbered parts at 10 µF 25 V and 10 µF 16 V.[5] MacDat says the greyscale 180's screen has none, so the Console5 list matches the 180c's Sharp display.[1]

PowerBook 180 inverter board capacitor map (MacDat)
The 180's backlight inverter (TDK CXA-2011, labelled for display 661-0748), with the 47 µF electrolytic in red and the 33 µF polymer in cyan (photograph credited by MacDat to GRudolf94)

Replacement parts

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MacDat advises electrolytic, polymer or tantalum replacements on the display boards, not ceramic, because ceramic capacitors' value varies with voltage and can make the contrast drift.[2] Parts owners have used:

  • 180c display: JDW chose polymer tantalum parts for their small size. He specified four KEMET T521B476M016ATE090 (47 µF 16 V) and five KEMET T521A106M025ATE150 (10 µF 25 V), using the 25 V part in all five 10 µF positions.[6]
  • 165c display: techknight used seven Yageo ESS106M063AE2EA (10 µF 63 V, 6.3 mm diameter, 2.5 mm lead spacing), which only just clear at 7 mm tall; JDW measured them at 7.7 mm. JDW's polymer alternative is the KYOCERA AVX RPF0605100M063K, which measured 5.6 mm tall.[7]
  • 165c brightness and contrast board: techknight used two Würth 870056174001 10 µF 80 V polymer capacitors, 8.9 mm tall and 8.2 mm in diameter by JDW's measurement.[7]
  • 180 inverter and all trackballs: a 47 µF 16 V and a 10 µF 16 V radial part.[1]

Procedure

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Disconnect the adapter and remove the main battery before starting. The boards carry CMOS parts that Apple warns are very sensitive to static.[8][4]

Remove the top case

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  1. Remove the I/O door.
  2. Remove the five Torx screws from the bottom case: a T-8 for the small screw at the rear connector panel and a T-10 for the rest.
  3. Lift the back of the top case and disconnect the interconnect cable.
  4. Lift the top case off, unhooking the two tab fasteners at the front of the bottom case.[8][4]

When refitting, fold the cable at the connector the way Apple's drawing shows. A wrongly folded cable can short.[8][4]

PowerBook 180 inverter board

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  1. With the top case off, remove the inverter board's two mounting screws.
  2. Pull the inverter board and its shield straight up off the connector on the interconnect board. Do not take the shield off the board.
  3. Disconnect the inverter cable.
  4. Replace the 47 µF capacitor. MacDat regards the polymer part as rarely failing.[1]
  5. Refit with the brightness and contrast pots lined up with the plastic actuators in the top case. Setting the pots and actuators to their extreme outer positions makes this easier.[8]

PowerBook 165c brightness and contrast board

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PowerBook 165c inverter board capacitor map (MacDat)
The 165c board with two slide controls and its two 8.2 µF 80 V capacitors circled (MacDat, image from oldcrap.org)

MacDat calls this the 165c's inverter board. It carries two slide controls and is labelled for use with display 661-0752, with assembly number 614-0017.[3] Apple's Service Source puts the 165c's brightness and contrast pots on the DC/DC converter, and JDW calls the board the DC-DC board.[4][7]

  1. With the top case off, remove the converter's two mounting screws.
  2. Pull the converter and its shield straight up off the connector on the interconnect board. Do not remove the shield. If you replace the whole converter, order a new shield (922-0418) with it and do not reuse the old one.
  3. Disconnect the converter-to-inverter cable.
  4. Replace the two 8.2 µF 80 V capacitors.
  5. Refit with the brightness and contrast pots lined up with the actuators, both set to their extreme outer positions.[4]

Trackball

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  1. With the top case off, pull out the locking tab on the trackball connector and remove the ribbon cable, which is fragile.
  2. Remove the two T-8 mounting screws and lift the trackball assembly from the top case.[8][4]
  3. Replace the 10 µF 16 V capacitor.[1]
PowerBook 100 series trackball capacitor (MacDat)
Trackball board with its 10 µF 16 V capacitor (photograph credited by MacDat to GRudolf94)

165c and 180c display

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  1. Remove the two plastic plugs from the display bezel, then the two bezel mounting screws with a T-8 driver. Pull the bezel down and away from the display to free it from the tabs at the top and sides.
  2. Disconnect the inverter-to-display cable from the DC/AC inverter, remove the inverter's two Phillips #0 screws, lift it out and disconnect the converter-to-inverter cable.
  3. Cover the keyboard with a cloth. Remove the four T-8 display mounting screws, lift the display out of its housing and EMI shield, and lay it face down on the keyboard.
  4. On a 165c, lift the locking tab on the display connector and unplug the display cable. On a 180c, unplug the cable from its two connectors with an IC extractor.
  5. Peel the display cable carefully off the back of the display. On the 165c it is stuck down near the connector and interconnect ends; on the 180c near the base of the display.[4]

The capacitors are on the display's own driver board; MacDat's photograph shows the 180c's.[2] BajaTym traced white columns on a recapped LQ9D01 to the flex-to-PCB joints along the top edge of the panel.[9] Clean off any leaked electrolyte before fitting new parts; see Battery Explosion, Capacitor or Corrosion Damage.

When refitting the DC/AC inverter, route the converter-to-inverter cable round the bottom right corner of the display so that it is not pinched.[4]

After the recap

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  • Test the display with the charts on PowerBook 180 Troubleshooting.
  • On a passive-matrix 165c some ghosting is normal. Yoda reports that a display whose capacitors are failing takes a minute or so for its brightness and contrast to settle after switching on.[10]
  • Kai Robinson notes that the 180c's Sharp panel was also sold as an industrial display. starlite reports that such panels are expensive and also need recapping.[11]
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References

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  1. ↑ 1.0 1.1 1.2 1.3 1.4 1.5 1.6 1.7 MacDat Capacitor Reference Library, "Capacitor Reference - PowerBook 180" (retrieved 2026-10-02). Logic board and screen all solid-state; LCD inverter board one 47 µF 16 V low-profile radial electrolytic and one 33 µF 10 V purple solid polymer that rarely fails; trackball one 10 µF 16 V radial electrolytic. Secondary source.
  2. ↑ 2.0 2.1 2.2 2.3 2.4 2.5 2.6 2.7 MacDat Capacitor Reference Library, "Capacitor Reference - PowerBook 180c" (retrieved 2026-10-02). No electrolytics on the logic board; Sharp LQ9D01 LCD four 47 µF 16 V, two 10 µF 25 V and three 10 µF 16 V surface-mount electrolytics; "a recap on sight", the capacitors leak and cause corrosion that cannot be repaired; use electrolytic, polymer or tantalum replacements, not ceramic, which can make the contrast drift; trackball one 10 µF 16 V. Secondary source.
  3. ↑ 3.0 3.1 3.2 3.3 3.4 3.5 3.6 MacDat Capacitor Reference Library, "Capacitor Reference - PowerBook 165c" (retrieved 2026-10-02). No electrolytics on the logic board; LCD seven 10 µF 63 V low-profile radial electrolytic (no reference image); LCD inverter board two 8.2 µF 80 V low-profile radial electrolytic, 10 µF 80 V a working substitute, and one polymer of unknown value that rarely fails; trackball one 10 µF 16 V; the display, inverter and trackball capacitors "don't always fail, but replacing them is not at all a bad idea as they can sometimes leak". Secondary source.
  4. ↑ 4.0 4.1 4.2 4.3 4.4 4.5 4.6 4.7 4.8 Apple Computer, PowerBook 165c/180c Service Source, hosted here as File:PowerBook 165c and 180c Service Source.pdf (see PowerBook 165c and 180c Service Source). PDF page numbers: main battery pp. 56-58; top case pp. 61-63; trackball pp. 64-66; DC/DC converter pp. 70-74; display bezel pp. 103-105; DC/AC inverter pp. 106-108; display pp. 116-122; display compatibility matrix p. 4; exploded view p. 150 (converter board 922-0375 for the 165c and 922-0379 for the 180c; inverter board 922-0374 and 922-0378).
  5. ↑ Console5 TechWiki, "Macintosh PowerBook 180" (retrieved 2026-10-02). Cap list headed "Sharp DC/DC": CU1-CU4 47 µF 16 V, CU5 10 µF 16 V, CU7 10 µF 25 V, CU8 10 µF 16 V, and two unnumbered 10 µF 25 V and 10 µF 16 V. Secondary source.
  6. ↑ TinkerDifferent forum thread "PowerBook 180c Display RECAPPING LIST", JDW, May 2026. Polymer tantalum list for the 180c display: four KEMET T521B476M016ATE090 47 µF 16 V and five KEMET T521A106M025ATE150 10 µF 25 V, chosen because they are small and do not need the derating of solid tantalum. Community parts list.
  7. ↑ 7.0 7.1 7.2 TinkerDifferent forum thread "PowerBook 165c Recapping List", JDW, May 2026. techknight's parts for the 165c: Yageo ESS106M063AE2EA for the seven 10 µF 63 V display capacitors (7 mm tall, only just clearing), and two Würth 870056174001 10 µF 80 V polymer for the brightness and contrast board; JDW's alternative KYOCERA AVX RPF0605100M063K polymer; JDW's measurements: Yageo 7.7 mm tall, about 9 µF; Kyocera 5.6 mm tall, about 9.4 µF; Würth 8.9 mm tall, 8.2 mm diameter, about 9.5 µF; JDW calls the board the DC-DC board and recapped it on video. Community parts list.
  8. ↑ 8.0 8.1 8.2 8.3 8.4 Apple Computer, PowerBook 160/165/180 Series Service Source, hosted here as File:PowerBook 160, 165 and 180 Service Source.pdf (see PowerBook 160, 165 and 180 Service Source). PDF page numbers: top case pp. 60-62; trackball pp. 63-65; inverter board pp. 69-73.
  9. ↑ TinkerDifferent forum thread "PowerBook 180c -- Vertical White Column Lines", September 2026. BajaTym: original panel banded from leaking capacitors; a recapped Sharp LQ9D01 showed alternating white columns, traced to the upper flex-to-PCB joints, with dark residue round them. Community repair report.
  10. ↑ TinkerDifferent forum thread "PowerBook 165c DISPLAY QUESTIONS", May-June 2026. Yoda: failing displays take a minute or so to settle at power-up and ghost more; akator: ghosting was normal on passive-matrix screens when new. Community experience.
  11. ↑ TinkerDifferent forum thread "Powerbook 180 & Tunnel Vision", September 2026 posts. Kai Robinson: the 180c's Sharp panel can still be bought because it was also used as an industrial display; starlite: such panels are very expensive and the ones from China need recapping. Community experience.


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