topic Re: HDMI lost signal in PCs & Accessories

HDMI lost signal

thornsdale — Tue, 10 Jun 2008 21:01:26 GMT

Many have complained in this forum, and others, of the problem where the HDMI signal is lost, both when the pc has been into sleep mode and after changes to the AV inputs on the connected tv/monitor. Reference has been made to the 'HDMI problem download'. What is this download file called, and just where do I find it?

(XL301connected to Panasonic TH42PZ85 via HDMI)

Re: HDMI lost signal

Thalamus. — Thu, 19 Jun 2008 18:32:47 GMT

'HDMI problem download'. What is this download file called, and just where do I find it?

I'm not sure what download you are referring too.

Have you installed the Win DVD updates for your Vaio via the Sony support download page.?

If not use the following link then select your model in the drop down list to download the updates: Sony Support Downloads

Re: HDMI lost signal

thornsdale — Fri, 20 Jun 2008 18:54:16 GMT


I'm not sure what download you are referring too.

There is a problem of the screen going blank after changing the AV input on the television to something else and then switching back to the pc. The same thing happens if the pc goes in to sleep mode. When it wakes up the screen is blank. In both cases I am told that a signal from the tv to the pc via the HDMI is lost and the pc video card then thinks that there is no HDMI connection and so stops sending the HDMI signal. Is there a download to fix this?

Meanwhile I'll check the WinDVD updates...

Re: HDMI lost signal

thornsdale — Sun, 22 Jun 2008 14:58:34 GMT

Meanwhile I'll check the WinDVD updates...

These made no difference to my problem. It's not DVD or even VMC related.

Re: HDMI lost signal

thornsdale — Sun, 22 Jun 2008 16:41:47 GMT

Just found an old thread that refers to HDMI Software 071025c

Does anyone know where I can find this?

Re: HDMI lost signal

V57... — Sun, 22 Jun 2008 16:59:04 GMT

Hi thornsdale,

Are you looking for this?
http://support.vaio.sony.co.uk/downloads/info/info.asp?site=voe_en_GB_cons&url=Downloads/NV/D/VID/NVDVID-01594301-UN.exe&ip=NVDVID-01594301-UN.htm

But I don't know if this is for your Vaio...

Best regards

Re: HDMI lost signal

thornsdale — Sun, 22 Jun 2008 19:05:41 GMT

Thanks V.57

Well I thought it was, but it seems that fix is for an audio problem with HDMI. I am looking for a fix that keeps the HDMI going after swapping AV inputs on my TV and swapping back to HDMI for the PC.

Re: HDMI lost signal

Thalamus. — Mon, 23 Jun 2008 17:58:35 GMT

Hi thornsdale,

have you always had this problem or is something new, if it's new did you make any changes or install anything prior to this.?


There is a problem of the screen going blank after changing the AV input on the television to something else and then switching back to the pc. The same thing happens if the pc goes in to sleep mode.

When you change channel on the TV or allow your Vaio to enter sleep mode is Media Center still open on your Vaio.?

If so try connecting your Vaio to your TV just after booting up, without launching any other applications, do you still have the same problems.?

Re: HDMI lost signal

thornsdale — Tue, 24 Jun 2008 11:35:29 GMT

have you always had this problem or is something new, if it's new did you make any changes or install anything prior to this.?

When you change channel on the TV or allow your Vaio to enter sleep mode is Media Center still open on your Vaio.?

I have always had this problem.
I don't know if VMC is still running as I can't see anything (blank screen).
This problem has been mentioned on this on other forums and the intelligent answer seems to say that HDMI relies on a control signal from the receiving device (ie the TV). If that control signal is dropped (ie when I switch my TV to a different AV input), the Vista/video driver says 'Oh dear, the control signal has dropped so I won't send anything else on that HDMI port' And it never gets out of that state without rebooting the pc.

Re: HDMI lost signal

Thalamus. — Tue, 24 Jun 2008 14:15:07 GMT

Thanks for the info...

could you please answer the following question.?

After booting up and without launching any other applications let your vaio enter sleep mode, do you still have the same problems.?

Re: HDMI lost signal

h4 — Mon, 30 Jun 2008 17:40:29 GMT

I must point out that this seems to be an inherent problem within the xl-301. i have tried on several ocassions to address this issue but to no avail. i am currently waiting for a vaio rep to get back to me. The last time i brought this up with Sony this was 'within spec', i.e. the system goes into sleep mode when no tv display is detected. As we know this is not the case, as the only way to wake the system, is to hard reset. to my knowldege only one user has been able to overcome this irratating 'feature' of Sony, and this was by replacing the hdmi graphics card.

the vaio rep has had me play with microsofts TMM settings in device manager, but nothing works. Will update when i hear from him

h4

Re: HDMI lost signal

jumpsuit — Mon, 30 Jun 2008 18:27:45 GMT

I have had problems keeping the hdmi connection after changing channel from the AV channel it plays on.

Sometimes I don't have any trouble, sometimes it just refuses to recognise the TV.

Sometimes I have to try and force display detection, sometimes just enabling it after one can't be found.

FN + F7 can help in selecting the display device.

I used to reboot to sort the problem out but have found that just re-inserting the hdmi lead or turning off the TV then turning it back on again can help.

Sorry I don't have a solution.

Edit - AR31S to Bravia TV

Re: HDMI lost signal

Tarzantony2 — Tue, 08 Jul 2008 14:59:33 GMT

Hi h4,

Did you get anywhere with this?

I have always had similar problems and followed the earlier thread you talked about. I thought I had the problem sussed after downloading the SP1 pack but after a week or so my xl301 was back to it's old tricks giving a black screen on wake up and sometimes when switching between TV and computer (AV5). This has irritated me for ages and something you don't expect from a high end machine like the Vaio - I was going to upgrade to a Bluray drive but dread to think what can of worms that will open. I get the feeling that there are few more 301 owners that have been in the same position and wonder if there really is a fix for this - if there is can someone out there let me know....please!

Tony

Re: HDMI lost signal

h4 — Fri, 11 Jul 2008 23:43:19 GMT

hi tarzantony,

yep, john from vaio did get back to me on several occassions to run through various diagnostics, but it seems that my problems have only gotten worse. every time i plugged in the hdmi cable it the xl301 would either blue screen, or just not start at all. Unplug and back to compnent and viola. so after speaking to his technicians he's asked me to do a clean install of vista without any updates or additional software. I'm doing this over the weekend (woopee) and he'll call on monday. of course i'll update, but i'm not sure what'll happen. my warranty expired last month but fortunately i rang in before this. i suppose i'll have to see. worst case scenario, one of the guys in the forums suggested a Leadtek hdmi card...hmm...

Re: HDMI lost signal

Tarzantony2 — Sun, 13 Jul 2008 08:50:52 GMT

Hi h4

I've no idea what a Leadtek Card is.

This all sounds a little OTT for what I think is a driver issue....still, have fun and let me know what transpires.

Good luck

T

Re: HDMI lost signal

Tarzantony2 — Sun, 13 Jul 2008 10:35:25 GMT

Hello again h4,

I was just browsing through some old forum threads and came across a posting from Chadlington on 23.4.08 that was really interesting. There is a link to AVS forum where some real heavyweight techies gather and there is an amazing discovery about 1080p and Vista Home which is pure gold in itself, but at the end of the thread was this:

........Another thing I noticed is that sometimes when the system is put on standby or when the TV is tuned away from the XL3 input, there is no video for some weird reason. One way I try to get around this is to press and hold the green power button on the XL3 remote for a few seconds then it kind of re-up itself then display video, I would rather not have this issue. Anyone got any idea or experience with this issue?

This could be what we're looking for?

I'll try it and see.

T

Re: HDMI lost signal

ITTroll — Tue, 15 Jul 2008 07:36:06 GMT

I have a variation of this problem too. Normally, once the HDMI signal has been established I can turn the TV on and off and switch A/V modes without any problems. However, if I let the VAIO go to sleep and then it wakes whilst the TV is turned off, the HDMI signal is lost. The only fix is to reboot the VAIO whilst the TV is on. It would seem that the VAIO (specifically the 7600GTL graphics card) requires that the TV is powered on during video initialisation in order to establish the HDMI signal (could this be because of HDCP?).

I avoid the issue by setting my VAIO to always on - which I prefer anyway. However I still hit the problem if the VAIO reboots whilst the TV is off, e.g. to install updates. As others have said I think the only answer is a new graphics card.

Re: HDMI lost signal

h4 — Thu, 17 Jul 2008 20:42:29 GMT

right so John from vaio told me to disable all disable all startup services. as well as this i was to set Ms TMM settings to off, after a clean install of vista without any updates. (hope that makes sense). but raher than a blue screen when i connect with hdmi i get a kind of red and green screen, which is awful. so this hasnt worked (and now i have to reinstall all my applications and programs again. how fun!!!!. but i'll wait before i do this since i'm expecting a call from john in the morning. will update after that.....

Re: HDMI lost signal

rsebre — Sun, 07 Sep 2008 11:08:45 GMT

Hello,
I too have had this problem, the only quick fix I know is to turn the TV off and on again.
I did some research into it and it seems that when we get the black screen, it seems our VAIO's are failing the HDMI Control feature.
Your TV knows it is receiving a signal but refuses to display it as it could be invalid or something.
Its to do with HDMI Control,....
Sometimes my PS3 does it too, its the TV and HDMI equipted device not talking to each other properly.
The only fix apart from tv off and on is, to change the power settings to never go in to sleep mode and never turn of the display. That and also making sure you HDMI cable is HDMI 1.3c complainant....
Hope this helps
RSebire

Re: HDMI lost signal

h4 — Fri, 12 Sep 2008 16:10:39 GMT

i would disagree. i have tried the tv on/off solution, and the others you sugeested. some might say you're fortunate to have found such an easy fix!

nonetheless i think you may be right in thinking that the hdmi control feature is failing. my system is currently with Sony in Brussels, with their senior technicians who happen to be conversing with Japan also. Its been with them for nearly two weeks, but i'll be patient i suppose.

TBH i'm not really sure what i expect after more than a year of trouble and spending god knows how much on wiring workarounds and other headaches.

will keep you updated