Ga door naar hoofdinhoud

Model A1312 / Mid 2010 / 3.2 GHz Core i3 or 2.8 & 3.6 GHz Core i5 or 2.93 GHz Core i7, ID iMac11,3

382 Vragen Bekijk alle

Bubbling on power supply circuit board?

Hello all!

I'm currently working on a mid-2010 i7 iMac that had exhibited signs of potential logic board failure (intermittently not recognizing installed RAM and beeping during POST, random self-restarting if you can get it to boot, etc).

In the midst of replacing the board, I noted that there is a substantial area of bubbling on the underside of the power supply board (see attached picture). I have seen similar bubbling on much older circuit boards (for example in 1990's BOSCH Motronic ECU's in cars) that would indicate a failure. I assume that's true here as well? I'm not familiar with how these circuits are produced, so I figured I would ask. Thanks for any help you can provide!

Block Image

Anders

Beantwoord! Bekijk het antwoord Dit probleem heb ik ook

Is dit een goede vraag?

Score 0
Voeg een opmerking toe

3 Antwoorden

Gekozen oplossing

I would consider that PSU a fire hazard and get it out of there. Your other symptoms may disappear once you have a good power supply.

iMac Intel 27" EMC 2309, 2374, 2390 or 2429 Power Supply

iMac Intel 27" EMC 2309, 2374, 2390 or 2429 Power Supply Afbeelding

Product

iMac Intel 27" EMC 2309, 2374, 2390 or 2429 Power Supply

$139.99

Was dit antwoord nuttig?

Score 2
Voeg een opmerking toe

might be some capacitors going bad. You might to want to replace the board entirely.

Was dit antwoord nuttig?

Score 0
Voeg een opmerking toe

Well the way I understand how boards are made is they are a fiber glass substrate that is bonded with a resin to stiffen the board , the board is then heat treated , circuits and other items are attached then its slightly floated over a river of solder to bond the compactors and other items to the board then heat treated once more and sealed , then off to testing . I am thinking that the board and the sealing risen is breaking down and expanding from heat and depending on age of the unit oxidation of the metals , not all mother boards are made the same way chemicals different from company to company and such . hope this helps .

Was dit antwoord nuttig?

Score 0
Voeg een opmerking toe

Voeg je antwoord toe

amrborg zal eeuwig dankbaar zijn.
Weergavestatistieken:

Afgelopen 24 uren: 0

Afgelopen 7 dagen: 0

Afgelopen 30 dagen: 1

Altijd: 217