Is this Backlight diode showing the correct reading?
I recently purchased this Ipad 2 A1396 as I was certain I could get it working again. With little experience behind testing filters and fuses I wanted this to be a learning experience.
The main issue is that the backlight is not on, causing the screen to display dim. So before I go out and shell out the extra money on an LCD that may possibly or may not fix the issue, I'd like to start with testing the circuit. As far as the research shows it's that the coil or filter are the usual suspects.
So I pulled out the handy multimeter and test the coil first. Looks good to me as the circuit completed with a long beep. Now when I test the filter/fuse I get no beep at all. Before I go ahead and replace. Is there anything else I should check for? Or do you know of a way to bypass this and should I?
Also thank you for all your previous help.
Is this a good question?
5 Comments
UPDATE: Ok, so I ran a check on the diode using the diode (which I named filter/fuse because I'm dumb as !&&*) check feature on the multimeter and I got 0.732 which I would suspect is in working operation. With the coil and diode all showing good I'm stuck at crossroad here...
by Justin Aka Taco
UPDATE 2: To avoid any confusion on the diode, it's not reading 0.732 it's actually reading 0.143. Sorry.
by Justin Aka Taco
With that said, there's really nothing on the schematic that can really point me to if it is the correct reading or not. Maybe I'm just not looking hard enough. I'll update if I find anything.
by Justin Aka Taco
Honestly I'm still learning the ropes with the multimeter. I haven't given up on wanting to learn. I can cut wires, make jumpers, test resisters, understand polarities, but testing diodes and filters, and capacitors are something I've yet to learn. As far as what I looked up on the web for the diode it was that my multimeter had a Diode test function withe symbol -->|. So pretty much all I did was test both leads and got that number. I must be doing something wrong then.
by Justin Aka Taco
Ok so I've tested the currency of the resistors near the LCD connector and those all show ok. The diode shows 0.156 on and when switching directions I get nothing...nada. So I suspect the culprit to this whole thing is possibly this diode.
by Justin Aka Taco