Electronics Repair (sci.electronics.repair) Discussion of repairing electronic equipment. Topics include requests for assistance, where to obtain servicing information and parts, techniques for diagnosis and repair, and annecdotes about success, failures and problems.

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
  #1   Report Post  
Posted to sci.electronics.repair
external usenet poster
 
Posts: 172
Default UPDATE: Dell Optiplex SX260 Computer Won't Boot Up

Hi,

UPDATE:

Every 2200uf 6.3V 105 deg. odd brand/no brand electrolytic capacitor
(about 12) is bad on the mother board. Regarding the brand, I see what looks
like, "2DIVDK", and in another location there is a "M" in a circle.

There were no bulges in any cap, but a loss of capacitance as measured
via a digital cap tester showing around 1400uf to 1500uf for these 2200/6.3
caps. Often an increase in ESR will cause a lower cap reading on this tester.
My ESR meter is not useful on large capacity caps.

I will order replacements, but since I have other good working computers,
I am in no hurry.

Thanks again to everyone for your replies, John

  #2   Report Post  
Posted to sci.electronics.repair
external usenet poster
 
Posts: 1,716
Default UPDATE: Dell Optiplex SX260 Computer Won't Boot Up





Every 2200uf 6.3V 105 deg. odd brand/no brand electrolytic capacitor
(about 12) is bad on the mother board. Regarding the brand, I see what
looks
like, "2DIVDK", and in another location there is a "M" in a circle.

There were no bulges in any cap, but a loss of capacitance as measured
via a digital cap tester showing around 1400uf to 1500uf for these
2200/6.3
caps.


** A significant loss of uFs indicates VERY bad caps with high ESRs.

Cos ESR rises first as the electrolyte vanishes up and only later does
capacitance drop.


.... Phil


Reply
Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules

Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
Dell Optiplex SX260 Computer Won't Boot Up [email protected] Electronics Repair 0 February 16th 13 02:49 PM
Dell Optiplex SX260 Computer Won't Boot Up [email protected] Electronics Repair 0 February 16th 13 02:40 PM
Dell Optiplex SX260 Computer Won't Boot Up [email protected] Electronics Repair 1 February 16th 13 09:11 AM
Dell Optiplex SX260 Computer Won't Boot Up [email protected] Electronics Repair 16 February 16th 13 05:31 AM
Dell Optiplex SX260 Computer Won't Boot Up [email protected] Electronics Repair 2 February 15th 13 04:04 PM


All times are GMT +1. The time now is 05:41 PM.

Powered by vBulletin® Copyright ©2000 - 2024, Jelsoft Enterprises Ltd.
Copyright ©2004-2024 DIYbanter.
The comments are property of their posters.
 

About Us

"It's about DIY & home improvement"