Display not working after SSD swap...VFD001 and PFM006, no LED 4.
I swapped my HDD for an SSD and in the process of reconnecting the display cable (LVDS?), unbeknownst to me, I skewered the corner of the cable pins on the logic board end when fitting it in - one of the pins snapped off. Tried to fire it up, and it did, but no display (not a backlight issue) and a fast fan. Took it apart and that’s when I noticed the cable was bad…
Got a new cable from eBay, replaced it, still no 4th LED or display.. Ran diagnostics and get vfd001 and pfm006. External monitor works fine. The fan runs fast, the system is sluggish, and the CPU runs at 70% with a high kernel rate of 200-300% (I don’t know WHAT that means, I just know how to find the stuff in the activity monitor and google…). I saw one post about bypassing the SMC to kick the kernel issue (unplug from wall, press power for 10seconds, plug in, and then press power again), which it worked and everything was SSD fast (at least something was working!) but of course the fan was going even faster then and still no display (only external works).
From what I can tell, there are no bad fuses/connections on either side of the board.
Are there any other SMC reset tricks or ways to know if the actual SMC chip is bad?
Thanks for any possible insights!
EDIT: Tested 3 new lvds cables and no change. I’m leaning towards a bad SMC chip or resistor somewhere that I can’t see.
Update (01/28/2020)
Here is a snapshot of the stat sensors that I realized I could get and possibly relate to an issue on the board. Notice that there are multiple sensors with no reading (including the LCD one…). Could anyone tell me where each of these are to confirm connection/look closer at?
-BLC Proximity
-LCD (I know this is the one on the back of the LCD near the LVDS cable)
-Logic board DIMM Local Board
- Logic board proximity
-SO-DIMM Proximity
-Timing Controller
I see the GPU has no power consumption listed, it’s just 0.00…that can’t be good for this issue, can it? Or does it only process if it’s actually got a place to send power (e.g., a properly connected display?)
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4 comentários
The other month I took the whole thing apart and looked everything over and still saw now burnt resistors or poor connections. Does anyone have insight on if an SMC can go bad without burning/melting? Those are the only images I've seen when they are bad, so I would think it'd be clearly visible if it were an issue. I checked the board on the LCD panel and everything is clean there too.
So now my next question: If the LCD were bad (potentially the VFD001 code), could that cause the SMC to be acting up (PFM006), or are they unrelated?
por Jordan
Did you ever fix this? I am having the exact same issue. Thanks! No internal video, high fan, and throttled CPU after replacing HDD
por Cory Holloway
@Cory Holloway
No, I finally just sold it for parts the other week. I hated doing that as I think it must've been some solder point or some small fix, but I didn't have the proper magnification or soldering tools to dig anymore on it and I wasted too much time trying to resolve it!
por Jordan
@technojorge
%#*@. Thanks, man. Yeah, I hate it. Just doesn't make sense. Unplugged two cables, swapped drive, replugged in cables. No reason for mass destruction lol. With the bent LVDS cable, i think it has to be the receiving port on the logic board, but don't know of anyone in my area that would be able to fix just the port and being a 2013, probably not worth the money to replace the entire logic board. Was planning to get a couple more years out of it.
por Cory Holloway