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Troubleshooting Power Supplies and Power Supply Design

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Technical discussion for power supplies. This covers PC supplies, and any other related power supply issue. When starting a new thread, please put the make AND model of your device in the thread title. Also be VERY descriptive of your issue, that way you'll get the best answer possible!

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Sticky: the gutless, bloated, and fried power supply hall of shame by ratdude747
Started by ratdude747, 12-18-2009, 05:18 AM
1,759 responses
579,417 views
0 likes
 Last Post PeteS in CA
by PeteS in CA
09-16-2024, 04:31 PM  
Sticky: Power supply build quality pictorial. part 2 by kc8adu
Started by kc8adu, 06-29-2009, 01:23 PM
3,227 responses
1,328,442 views
0 likes
 Last Post japlytic
by japlytic
09-14-2024, 07:04 PM  
Sticky: List of pin compatible pwm/supervisor PSU ICs by Quaddro
Started by Quaddro, 12-06-2019, 02:54 AM
18 responses
11,895 views
0 likes
 Last Post tartuf
by tartuf
01-17-2023, 06:36 PM  
Sticky: WARNING: Live heatsinks & single pole on/off switches in switching power supplies by Per Hansson
Started by Per Hansson, 06-09-2021, 12:01 PM
6 responses
7,333 views
0 likes
 Last Post RJARRRPCGP
by RJARRRPCGP
12-29-2021, 12:12 AM  
Sticky: The PSU FAQ by PeteS in CA
Started by PeteS in CA, 08-28-2005, 04:29 PM
55 responses
124,638 views
0 likes
 Last Post bianchi77
by bianchi77
08-31-2016, 11:54 PM  
Sticky: General PSU Discussion and FAQ contributions by PeteS in CA
Started by PeteS in CA, 08-28-2005, 04:29 PM
20 responses
68,817 views
0 likes
 Last Post moe2020
by moe2020
10-04-2015, 12:04 AM  
Sticky: Power supply build quality pictorial DISCUSSION by dood
Started by dood, 12-21-2005, 03:39 PM
353 responses
220,544 views
0 likes
 Last Post momaka
by momaka
06-19-2014, 12:52 PM  
Closed, Sticky: Power supply build quality pictorial.closed.use part 2 by dood
Started by dood, 12-21-2005, 03:39 PM
410 responses
433,624 views
0 likes
 Last Post jvyt
by jvyt
06-25-2009, 01:40 AM  
Dell E2016HV no power. by asiart
Started by asiart, 12-22-2023, 04:32 AM
6 responses
205 views
0 likes
 Last Post stj
by stj
12-26-2023, 08:49 AM  
Repair of Sign WiFi Smart Plug PCB: SA-P302A v1.2 due to bad caps - with schematic by Per Hansson
Started by Per Hansson, 12-23-2023, 06:20 AM
2 responses
332 views
0 likes
 Last Post CapLeaker
by CapLeaker
12-24-2023, 05:54 AM  
How can i connect type c cable to 19v power supply by shadow666
Started by shadow666, 12-23-2023, 03:32 AM
1 response
112 views
0 likes
 Last Post stj
by stj
12-23-2023, 08:36 AM  
APC BACKUPS-RS550 not charging battery by jinu_j
Started by jinu_j, 02-19-2020, 09:24 AM
29 responses
9,385 views
0 likes
 Last Post redwire
by redwire
12-20-2023, 12:25 PM  
12V 10A CCTV camera system power supply pulsating by rddube
Started by rddube, 10-08-2023, 02:33 PM
241 responses
8,887 views
0 likes
 Last Post sam_sam_sam
by sam_sam_sam
12-18-2023, 07:40 AM  
42 Watt LED Yard tare down recap ** How good is this switching power supply by sam_sam_sam
Started by sam_sam_sam, 07-15-2018, 10:37 AM
15 responses
2,051 views
0 likes
 Last Post sam_sam_sam
by sam_sam_sam
12-16-2023, 08:12 PM  
none OEM charger for iPad Pro 12.9 by paparazzo79
Started by paparazzo79, 12-15-2023, 06:04 AM
8 responses
154 views
0 likes
 Last Post CapLeaker
by CapLeaker
12-16-2023, 05:45 AM  
Sony HCD DZ280 PSU by michel74
Started by michel74, 10-23-2023, 10:19 AM
4 responses
561 views
0 likes
 Last Post sam_sam_sam
by sam_sam_sam
12-10-2023, 08:42 AM  
Input Filter Filling: How to Choose Components? by cheese007
Started by cheese007, 12-06-2023, 09:59 AM
1 response
94 views
0 likes
 Last Post PeteS in CA
by PeteS in CA
12-06-2023, 08:20 PM  
UC3842 Power Adapter Blowing Fuse by Dannyx
Started by Dannyx, 12-05-2023, 12:06 PM
3 responses
149 views
0 likes
 Last Post Dannyx
by Dannyx
12-06-2023, 01:30 AM  
Psu repair: UC3845 not starting up because of NE555 defect by vieuxchoub
Started by vieuxchoub, 12-02-2023, 12:56 PM
3 responses
265 views
0 likes
 Last Post PeteS in CA
by PeteS in CA
12-04-2023, 08:54 PM  
Conformal coating on Samsung U32D970 monitor PSU, do I need to replace after repair? by psyduck
Started by psyduck, 11-27-2023, 06:56 PM
2 responses
110 views
0 likes
 Last Post sam_sam_sam
by sam_sam_sam
12-03-2023, 01:17 AM  
Problems with a LINEAR power supply by Francesc V.
Started by Francesc V., 09-06-2023, 12:21 AM
9 responses
877 views
0 likes
 Last Post sam_sam_sam
by sam_sam_sam
12-03-2023, 01:08 AM  
IGBT replacement by Alekov_31
Started by Alekov_31, 11-23-2023, 02:36 AM
2 responses
167 views
0 likes
 Last Post petehall347
by petehall347
12-02-2023, 08:54 PM  
Led lights PCB burnt can I replace with these PCB? by irepair559
Started by irepair559, 11-19-2023, 03:51 PM
3 responses
238 views
0 likes
 Last Post irepair559
by irepair559
11-29-2023, 12:25 AM  
Nintendo 64 PSU - Secondary side dead by raider988
Started by raider988, 06-07-2019, 01:35 AM
18 responses
4,146 views
0 likes
 Last Post traianvui
by traianvui
11-27-2023, 05:40 PM  
Corsair RM850x Synchronous ATX PSU - need help diagnosing by W1ngl3t
Started by W1ngl3t, 11-17-2023, 02:42 AM
2 responses
244 views
0 likes
 Last Post CapLeaker
by CapLeaker
11-27-2023, 03:22 PM  
How can I identify varistor which have been blew up? by chth96
Started by chth96, 11-26-2023, 08:52 AM
8 responses
235 views
0 likes
 Last Post chth96
by chth96
11-26-2023, 09:44 PM  
Unidentified Mosfet power supply by aldo.trentamiglia
Started by aldo.trentamiglia, 11-26-2023, 11:41 AM
1 response
94 views
0 likes
 Last Post lotas
by lotas
11-26-2023, 01:44 PM  
Fractal Design Integra 750W blown resistor by Kuhanzzi
Started by Kuhanzzi, 11-24-2023, 03:20 AM
1 response
72 views
0 likes
 Last Post stj
by stj
11-24-2023, 01:15 PM  
Enermax EG365P-VE by i4004
Started by i4004, 03-08-2008, 01:29 PM
9 responses
6,455 views
0 likes
 Last Post g1150
by g1150
11-21-2023, 08:44 AM  
Atx psu 5Vstb present, no output by adelage
Started by adelage, 11-10-2023, 08:13 AM
9 responses
882 views
0 likes
 Last Post adelage
by adelage
11-20-2023, 05:26 PM  
Power Mac G4 MDD "Mirror-Door" won't power up by cyclones
Started by cyclones, 06-23-2010, 04:37 PM
125 responses
60,241 views
0 likes
 Last Post bzyzny
by bzyzny
11-20-2023, 02:03 PM  
ADBMS6815 full datasheet or SPI register description by uvoll
Started by uvoll, 11-20-2023, 09:48 AM
0 responses
125 views
0 likes
 Last Post uvoll
by uvoll
11-20-2023, 09:48 AM  
V-moto emax 80l electric moped by azza1234
Started by azza1234, 11-19-2023, 06:31 AM
2 responses
184 views
0 likes
 Last Post azza1234
by azza1234
11-19-2023, 08:46 AM  
Desoldering station ZD 915 no indications, no heating by rippergr
Started by rippergr, 10-24-2023, 11:46 AM
16 responses
1,332 views
0 likes
 Last Post rippergr
by rippergr
11-18-2023, 01:12 AM  
iMac a1225 Power Supply Board LITEON PA-3241-02A1 Repair by TheDaneH3
Started by TheDaneH3, 08-21-2020, 09:50 PM
5 responses
3,479 views
0 likes
 Last Post MikeCebula
by MikeCebula
11-16-2023, 06:07 PM  
Liteon pa-3271-06mx help!!!! by NConstantinou
Started by NConstantinou, 11-10-2023, 02:58 AM
12 responses
778 views
0 likes
 Last Post harp
by harp
11-14-2023, 08:57 AM  
Cyberpower 1500AVR UPS repair by quickname
Started by quickname, 11-12-2023, 09:57 AM
1 response
585 views
0 likes
 Last Post quickname
by quickname
11-12-2023, 03:55 PM  
WT7527 supervisor shutting down a good PSU by MarkC1970
Started by MarkC1970, 11-05-2023, 11:26 AM
10 responses
1,243 views
0 likes
 Last Post MarkC1970
by MarkC1970
11-10-2023, 10:51 PM  
Component without datasheet IC's labeled "IN1S313I" and"IN1S424I" by Alimash
Started by Alimash, 10-29-2023, 10:13 AM
4 responses
664 views
0 likes
 Last Post lotas
by lotas
11-09-2023, 02:29 PM  
Look for the resistor value in the BenQ G922HDAL monitor's power supply by Safrilhg
Started by Safrilhg, 11-06-2023, 12:43 PM
5 responses
360 views
0 likes
 Last Post Safrilhg
by Safrilhg
11-06-2023, 08:49 PM  
Lincoln Electric LE31MP welder not turning on by tibimakai
Started by tibimakai, 10-14-2023, 07:40 PM
29 responses
2,213 views
0 likes
 Last Post tibimakai
by tibimakai
11-06-2023, 10:11 AM  
adjusting a 12V inverter to 24V by eccerr0r
Started by eccerr0r, 11-03-2023, 04:24 PM
9 responses
570 views
0 likes
 Last Post CapLeaker
by CapLeaker
11-05-2023, 05:55 PM  
How does this switching PS work ? by michel74
Started by michel74, 11-02-2023, 12:35 PM
5 responses
473 views
0 likes
 Last Post PeteS in CA
by PeteS in CA
11-03-2023, 12:14 PM  
Altec MX6021 by ant3202
Started by ant3202, 02-08-2017, 12:44 AM
67 responses
22,666 views
0 likes
 Last Post ramirog96
by ramirog96
11-02-2023, 12:12 PM  
Zig X70 Caravan battery Charger Component identification by garrymc123
Started by garrymc123, 07-21-2019, 08:44 AM
19 responses
6,979 views
0 likes
 Last Post stmaster3600
by stmaster3600
11-01-2023, 10:13 PM  
Industrial 24 VDC PS troubleshooting by RD_Atlanta
Started by RD_Atlanta, 06-25-2023, 08:54 AM
11 responses
1,536 views
0 likes
 Last Post Dunerdr
by Dunerdr
11-01-2023, 01:43 PM  
Golf trolley charger Model G60 A2A power supply schematic by tomark
Started by tomark, 10-29-2023, 06:58 AM
2 responses
350 views
0 likes
 Last Post petehall347
by petehall347
10-29-2023, 08:57 AM  
Apple A1407 Thunderbolt Display Power Supply PA-3251-3A by bosscharles
Started by bosscharles, 02-23-2021, 06:15 PM
14 responses
4,183 views
0 likes
 Last Post thesmith
by thesmith
10-27-2023, 08:42 AM  
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