One more log from another DM8000HD box, with DE-OpenBlackHole 1.4 image.

[4294700.480000] Initializing adapter 0 (BCM4501 (internal)-DVB-S2)
[4294700.482000] bcm4501: found 4501, revision 2(c0)
[4294700.482000] bcm_initAP
[4294700.490000] BCM4501: upload & start firmware
[4294701.837000] bcm4501: ap not running - start now
[4294701.848000] 4501 uCode 0x65
[4294701.852000] DVB: registering adapter 0 frontend 0 (bcm4501)...
[4294701.853000] Initializing adapter 1 (BCM4501 (internal)-DVB-S2)
[4294701.853000] DVB: registering adapter 0 frontend 0 (bcm4501)...
[4294701.854000] Initializing adapter 2 (Philips TU1216-DVB-T)
[4294701.854000] DVB: registering adapter 0 frontend -2143940608 (Philips TDA10046H DVB-T)...
[4294701.854000] Initializing adapter 3 (Philips CU1216Mk3-DVB-C)
[4294701.856000] DVB: registering adapter 0 frontend 0 (CU1216Mk3)...

and another DM8000HD, also with DE-OpenBlackHole 1.4,

[4294702.817000] BCM4501: upload & start firmware
[4294704.173000] bcm4501: ap not running - start now
[4294704.184000] 4501 uCode 0x65
[4294704.189000] DVB: registering adapter 0 frontend 0 (bcm4501)...
[4294704.189000] Initializing adapter 1 (BCM4501 (internal)-DVB-S2)
[4294704.190000] DVB: registering adapter 0 frontend 0 (bcm4501)...
[4294704.190000] Initializing adapter 2 (Philips TU1216-DVB-T)
[4294704.190000] DVB: registering adapter 0 frontend -2143940608 (Philips TDA10046H DVB-T)...
[4294704.190000] Initializing adapter 3 (Philips CU1216Mk3-DVB-C)
[4294704.192000] DVB: registering adapter 0 frontend 0 (CU1216Mk3)...

and a Third, DE-OpenBlackHole 1.4 always,

[4294698.625000] Initializing adapter 0 (BCM4501 (internal)-DVB-S2)
[4294698.627000] bcm4501: found 4501, revision 2(c0)
[4294698.627000] bcm_initAP
[4294698.633000] BCM4501: upload & start firmware
[4294699.986000] bcm4501: ap not running - start now
[4294699.996000] 4501 uCode 0x65
[4294700.001000] DVB: registering adapter 0 frontend 0 (bcm4501)...
[4294700.002000] Initializing adapter 1 (BCM4501 (internal)-DVB-S2)
[4294700.003000] DVB: registering adapter 0 frontend 0 (bcm4501)...
[4294700.003000] Initializing adapter 2 (Philips TU1216-DVB-T)
[4294700.003000] DVB: registering adapter 0 frontend 5 (Philips TDA10046H DVB-T)...

TS

Finally found it. I checked bot the message files in /var/log the other day and there was no reference to DVB but I booted tonight and it was there. It would appear that the DVB-T tuners are not detected at all in DE-OpenBlackHole 1.4

Jan 1 01:00:53 dm8000 user.info kernel: [4294702.397000] DVB: registering new adapter (BCM7400)
Jan 1 01:00:53 dm8000 user.warn kernel: [4294702.501000] autodetecting NIMs...
Jan 1 01:00:53 dm8000 user.warn kernel: [4294702.502000] ret: -145, feid: 00
Jan 1 01:00:53 dm8000 user.warn kernel: [4294702.502000] ret: -145, feid: 00
Jan 1 01:00:53 dm8000 user.warn kernel: [4294702.502000] Initializing adapter 0 (BCM4501 (internal)-DVB-S2)
Jan 1 01:00:53 dm8000 user.info kernel: [4294702.506000] bcm4501: found 4501, revision 2(c0)
Jan 1 01:00:53 dm8000 user.warn kernel: [4294702.506000] bcm_initAP
Jan 1 01:00:53 dm8000 user.warn kernel: [4294702.511000] BCM4501: upload & start firmware
Jan 1 01:00:53 dm8000 user.debug kernel: [4294703.866000] bcm4501: ap not running - start now
Jan 1 01:00:53 dm8000 user.warn kernel: [4294703.877000] 4501 uCode 0x65
Jan 1 01:00:53 dm8000 user.warn kernel: [4294703.881000] DVB: registering adapter 0 frontend 0 (bcm4501)...
Jan 1 01:00:53 dm8000 user.warn kernel: [4294703.882000] Initializing adapter 1 (BCM4501 (internal)-DVB-S2)
Jan 1 01:00:53 dm8000 user.warn kernel: [4294703.882000] DVB: registering adapter 0 frontend 0 (bcm4501)...
Jan 1 01:00:53 dm8000 user.warn kernel: [4294703.883000] CI removed...
Jan 1 01:00:53 dm8000 user.warn kernel: [4294703.884000] CI removed...
Jan 1 01:00:53 dm8000 user.warn kernel: [4294703.885000] CI removed...
Jan 1 01:00:53 dm8000 user.warn kernel: [4294703.886000] CI removed...
Jan 1 01:00:53 dm8000 user.warn kernel: [4294703.890000] 9348 ms: 18

Don't know if this helps but I've attached an image of the tuner. I'm betting you need to see the inside.

I still don't think I'm getting the required voltage to the tuners. Is it possible that U1 is faulty, thus not providing the correct voltage?

Photos of my 2 tuners (Terrestrial on top, and bottom is Cable),

TS

Is you Terrestrial genuine Philips? It seems to have extra components on the exposed part of the PCB. Up the top in that picture.

Don't know if it makes any difference. Mine worked fine for years.

Hoffy.

Yeah well, maybe it's nothing but I had the impression that the one with fuse working fine for the 800hd/8000hd

The one without works with the 800se.
At least, that's my findings with the two.

But if it has worked before, both.. than it it seems to me a driver issue.

Or else, when they work, measure the Pin 3.
Also when they failed.
Maybe it has to do with it.