Hanns Spree 28" Monitor ( HF289H ) Will not Power Up

[MannyOM]

Hello. I have read a few posts here about it and of course I have the same problem. The other models I read about are a different model and Pics show the Power Supply Board to be a bit different. I have had the same problems as the other posts for a few years. Worked fine for several years then Every time I turned off the Monitor it took 15 mins to start once powering up the CPU. Then Progressively it took up to 3 or even 3 hrs to power up. Around August this summer I decided to just leave it on all the time and not power it off since it was a Headache to get it to power back up. Well about a week ago got home around 10:00 PM and the CPU running but Monitor was out. The Amber and or Blue Light to show if power is on iss not blue anymore. Here is how it goes. When the Monitor was acting up it would only flick an amber light if one connected and disconnected the HDMI line coming from the Video Card. Every once in a while in the past once connecting and disconnecting the HDMI it would make the power come on or make the blue light come on and remain on. Now " No Power at all after waiting hours..... but the light will still flicker to amber if one disconnects and Reconnects the HDMI line to the Monitor. From all I read I am assuming it is the Capacitor, or the Fuse.. Now I am a Handy Person on all aspects but Never Studied capacitors and so on. lol Anyways I am a lil Lost but willing to Replace a Capacitor or 2 or 3 if needed. I have a Multimeter and a Soldering gun. I dont know where to start based on my Power supply board and or Logic Board. I did take some pics. I have Large files if needed but will posts some 2000 x 1400ish as requested by Admins. I did notice my Logic Board has a Large heat spot on it but all caps seem to be OK or at least not swollen at all. On my PSB there seems to be one of them that has not really swollen like I have seen some in the past somewhere...lol But it is a lot more bulged than the surrounding ones. Any Input will help. Thanks. Manny

Actually Pics wouldnt Load.... It said something about a needing a token...

[PlainBill]

Re: Hanns Spree 28" Monitor ( HF289H ) Will not Power Up

Hello. I have read a few posts here about it and of course I have the same problem. The other models I read about are a different model and Pics show the Power Supply Board to be a bit different. I have had the same problems as the other posts for a few years. Worked fine for several years then Every time I turned off the Monitor it took 15 mins to start once powering up the CPU. Then Progressively it took up to 3 or even 3 hrs to power up. Around August this summer I decided to just leave it on all the time and not power it off since it was a Headache to get it to power back up. Well about a week ago got home around 10:00 PM and the CPU running but Monitor was out. The Amber and or Blue Light to show if power is on iss not blue anymore. Here is how it goes. When the Monitor was acting up it would only flick an amber light if one connected and disconnected the HDMI line coming from the Video Card. Every once in a while in the past once connecting and disconnecting the HDMI it would make the power come on or make the blue light come on and remain on. Now " No Power at all after waiting hours..... but the light will still flicker to amber if one disconnects and Reconnects the HDMI line to the Monitor. From all I read I am assuming it is the Capacitor, or the Fuse.. Now I am a Handy Person on all aspects but Never Studied capacitors and so on. lol Anyways I am a lil Lost but willing to Replace a Capacitor or 2 or 3 if needed. I have a Multimeter and a Soldering gun. I dont know where to start based on my Power supply board and or Logic Board. I did take some pics. I have Large files if needed but will posts some 2000 x 1400ish as requested by Admins. I did notice my Logic Board has a Large heat spot on it but all caps seem to be OK or at least not swollen at all. On my PSB there seems to be one of them that has not really swollen like I have seen some in the past somewhere...lol But it is a lot more bulged than the surrounding ones. Any Input will help. Thanks. Manny

Actually Pics wouldnt Load.... It said something about a needing a token...

The 'token' issue is because the pictures are too large. I use Hamrick's Vueprint Pro to crop and adjust picture size. It's free; note the serial number when you download it.

Microsoft Live Photo Gallery and Paint will also do the job.

PlainBill

[MannyOM]

Re: Hanns Spree 28" Monitor ( HF289H ) Will not Power Up

Thanks Bill... I looked them over and 2 of them were 1.97 and 1.92 Mb's... I knew the limit was 1.9 on JPG's. I was just trying to keep it a bit too close for best viewing purposes.. Well here they are. Thanks Bill.

Manny

[retiredcaps]

Re: Hanns Spree 28" Monitor ( HF289H ) Will not Power Up

Worked fine for several years then Every time I turned off the Monitor it took 15 mins to start once powering up the CPU. Then Progressively it took up to 3 or even 3 hrs to power up. Around August this summer I decided to just leave it on all the time and not power it off since it was a Headache to get it to power back up.

This sounds like symptoms of dried up caps with high ESR. As the caps warm up, the ESR drops and allows the circuit to work. This is very similar to

https://www.badcaps.net/forum/showthread.php?t=11329

The OP found 3 dried up caps with an ESR tester.

Since caps don't always bloat when they go bad, the standard recommendation from members is to replace ALL the electrolytic caps on the power board with the exception of the largest filter cap which rarely, but not never, fails. Use something like Panasonic FM series caps.

If you also follow the above thread, you can use your multimeter to see if 5V standby is present on your board or not.

[MannyOM]

Re: Hanns Spree 28" Monitor ( HF289H ) Will not Power Up

One quick question... On the Original Brown caps... Is the Gray Stripe with the red dot the negative pole? Because I just replaced the cap and placed the negative pole on the new Radio Shack cap on the same hole on the board. It tripped my braaker or GF5 wen I tried attaching the power cord.. I did have a llose screw that might of grounded the case to the HeatSink Plate... Everything seems cool hopefully.

[retiredcaps]

Re: Hanns Spree 28" Monitor ( HF289H ) Will not Power Up

Is the Gray Stripe with the red dot the negative pole?

The stripe is usually negative. Pay attention BEFORE you desolder which way the cap sits on the board.

This site has a good cap tutorial in the FAQ

https://www.badcaps.net/forum/showthread.php?t=485

Because I just replaced the cap and placed the negative pole on the new Radio Shack cap on the same hole on the board.

Do NOT use Radio Shack caps. They sell general purpose caps are NOT suitable for this SMPS application. You need low ESR caps like Panasonic FM series available from mouser or digikey.

PS. Check your soldering. If you created a solder bridge, it may lead to a short. It sounds like the loose screw would have tripped your breaker.

[EdPenn]

Re: Hanns Spree 28" Monitor ( HF289H ) Will not Power Up

Hi
I used one of your pics of the PS on HF289H and added info on caps measured with ESR meter.
The pic #1 info has all the values measured on the board with all caps replaced.
It was dark screen, no LEd before. Now is OK.
The pic # 2 info has values measured on another bad board.
It was yellow LED not starting up.
I replaced just one cap which looked totally out of specs (C603) and now I get blue LED.
I measured all the caps removed from board # 1 and it looks like all the 22uF 35V caps are problematic.
I will replace all the caps but the board already works.