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Totally get that. Thank you so much for your help so far!

Visually all vias look good, except maybe for the one connected to pin 1 of Q23, but that one measures good. I've been prodding around some without finding anything. Area has been through a vinegar, distilled water bath followed by a IPA scrub and a dry / bake run in the oven. However, In...

Tried MacTest 2.0, which I now can confirm works also on non backlit portables, but as mentioned, only under System 6.0.4. Anyhow it gave the same result, might error out if the charger isn’t connected. Anyhow, prodded some more, for the millionth time, AND, I feel it might be closing in this...

Hmm pin 1 of Q21 reads 12v for a split second on cold boot, before hitting and staying on 0v, so I guess that isn't floating (that should be a voltage somewhere in between right?) Pin 2 & 3 reads 12v. Q23 reads 0.6v on Pin 1 which might be odd (?) as that is the 5v disk line? Pin 2&3 of Q23...

Another day another fault hunt. 1. Placing my finger on top of Q21 or C22 alleviates the issue!! Just having my finger on top moves the line upwards and restore4s the display to perfect condition over about 20 seconds or so. This is even without applying any pressure. Pressing with a non...

Hmm that's odd with 1.0.2 reporting power manager failure on your unit too. Thanks for checking. Will have to try 2.0 but that required 6.0.4 specifically and not even sure it supports the non backlit.

Yup, non backlit, original hybrid.

Another vote for the gentle twist method. Zero lifted pads since I started doing that.

Hmm some development. A) I ran MacTest Portable 1.0.2. All tests pass but it fails on the power manager. I started tracing all lines from the pmgr relating to the display or video systems but so far every trace I’ve checked have been OK. B) The line is now about twice is high, even though I...

Will have to try MacTest Pro, thanks for the tip! The VGA adapter is really cool, been eyeing it as a route for a modern lcd replacement. But as the external video connector is basically just a mirror of the internal one, I’d be 99.9% sure it would show the same line error 😬.

Well I'm an idiot, I read the R163-R167 cluster the wrong way around, so all FPData lines turned out to be OK too. I've now checked every single line going to the video chip and the vram, incl. resistance, pins for shorts etc. and found ... nothing.. so uhm not sure where to go next...

Depending on which rom you have on your card, you might be able to do 1024*768@256. I believe mine does. The GrandVimage for SE/30 is a rare thing, your best bet would be to find one on Yahoo Japan, although I haven't seen one for sale for years (and I've been keeping an eye out for one as well).

Thank you, I’ve checked all caps and they should be ok / not shorted to other traces. I haven’t updated this thread, but I did ultimately find a broken trace and several with high resistance on the FPData lines as the vias around J20 were eaten up. I’m still waiting for some supplies but will...

Just in case you weren’t aware, these cards listens to keyboard presses on boot to switch resolutions. VDR-2 / Vimage 24bit (not grand vimage) numbers attached (press the corresponding number upon boot)

I've traced out and double checked all caps, so am fairly confident they are all in order. Also traced out a ton of other things as suggested by gemini, but still no progression in tracking down the issue. Will trace out all vram / video driver chips etc if no one has a better idea on where to look?

Spoke too soon. Everything in the contrast curcuit checks out OK. The hunt continues.

Started poking around the contrast curcuit and seem to have found a broken trace going to Q12. It’s on the other side of the board so will hunt around some more to hopefully not have to run a super long bodge wire 😅

Hello! I just recapped a Macintosh Portable. It boots and seems to work fine, however, it has a row about 20-30 pixels high at the top of the screen that doesn’t work (see images). I’ve tried several displays, so it must be something on the mainboard that causes it. Any tips for likely culprits...

Just wanted to share what I did, found a 24v 150w led driver on Amazon for about $12. The fit was juuust right, making it somewhat easy to fit it in the original casing. Speaking of which, i simply pulled the sides off using only my fingers, pulling on one side until the clip on that side...

I actually looked into replacing the resistor, but I couldn’t even manage to figure out which on to change on the driver board (pcb800099) 😅. I got ahold of the panel spec sheets so know what the backlight wants for full light. It should be 300 nits, but juding how dim it is I really don’t think...