Old Monitor taking too much time to get signal

[DeadlyTitan]

So i have this old Asus 21" 1080p 60hz monitor that's been unused for some time (probably 2 years unused?) cause of work and college. Today i decided to plug it to my workstation as additional screen and there's the problem, it takes a lot of time before it turns on. Am not actually sure if its the right term i mean i tested the monitor like i kept it on for an entire day but not connected to a PC, i turned off the monitor an entire day and connected it to the PC and turned it on the next day. and no matter what i do it seems it takes 10 ~ 15 mins for the monitor to get signal from the PC, tried it with other PC and have the same problem even if the monitor is powered on the entire day it still takes about 10 mins before it actually detects the signal and displays anything. So i was wondering what could be the problem? it used to work perfectly fine before i tucked it away for a long time cause of work.

 

[VirtualLarry]

power supply capacitor degradation

 

[DeadlyTitan]

I did noticed that it have severe light bleeding (which it did not had previously) from the top (all of the top) so probably mishandled when i was not at home and busy at the university.

power supply capacitor degradation

If that's the case then the monitor should not even power up? or should take a long time to power up? I dont know, this is a really old and kinda overused monitor and the only rest it has is when i tucked it away when i went to university. only to turn it on after 2 ~ 3 years.

I kept the monitor powered for an entire day and then connected it to the system and it still took 10 ~ 15 mins to show anything. Then after a few mins i decided to restart the computer and Bam again took 15 mins to get the signal and show anything on screen although it was powered on all this time and only thing i did is restart the computer.

 

[dave_the_nerd]

I did noticed that it have severe light bleeding (which it did not had previously) from the top (all of the top) so probably mishandled when i was not at home and busy at the university.



If that's the case then the monitor should not even power up? or should take a long time to power up? I dont know, this is a really old and kinda overused monitor and the only rest it has is when i tucked it away when i went to university. only to turn it on after 2 ~ 3 years.

I kept the monitor powered for an entire day and then connected it to the system and it still took 10 ~ 15 mins to show anything. Then after a few mins i decided to restart the computer and Bam again took 15 mins to get the signal and show anything on screen although it was powered on all this time and only thing i did is restart the computer.

Basically, a monitor has three* parts. A PSU board, a logic board, and the LCD itself.

*This assumes you count the back-light as part of the LCD, even though it's technically not, and count the little control board with the buttons as part of the logic board, which it plugs into but is usually not physically a part of. Maybe instead of "parts" I should say "major subsystems."

PSUs are prone to capacitor degradation and can cause a lot of weird "wonky monitor" problems, like not always turning on, turning off for no apparent reason, etc. Because of the big capacitors used to convert AC to DC power, and because of cheap manufacturers, they're the source of probably 90+% of "wonky monitor" issues.

But to me, what you're describing (full blast backlighting, auto-sense failures, etc.) sounds a lot more like a bad logic board. Fortunately, you can probably find a replacement for way less than the cost of a new monitor - I usually start with shopjimmy because they're local to me (so shipping is fast) or, you know, eBay. Actually swapping it will probably be a piece of cake.

That assumes the parts are cheaper than a new monitor. (If you get lucky on a sale or get something that's a factory refurb, you can get a ~21" 1080p display for like $100.)

Good luck.

 

[VirtualLarry]

you can get a ~21" 1080p display for like $100.

Newegg had a Sceptre, with VGA / DVI / HDMI and speakers, for $60 after a $10 off promo code very recently.

 

[GEOrifle]

I got brand new HP OMEN 32" and it takes around 20 sec to power up, do you think it's degraded power capacitor too?
Old one 24" LG i had 8 year old, it was waking up in 2 sec, faster chip?

 

[VirtualLarry]

Maybe my suggestion is wrong? I've seen screens, with failing PSUs / caps, that take like 30 seconds before the backlight even finally comes on solid.

But my 40" 4K UHD screens also have quite a bit of a delay when they power-on, or wake up. It displays a full-screen logo, after initialization, then it syncs up to an input, and displays the input OSD.

 

[dave_the_nerd]

Maybe my suggestion is wrong? I've seen screens, with failing PSUs / caps, that take like 30 seconds before the backlight even finally comes on solid.

But my 40" 4K UHD screens also have quite a bit of a delay when they power-on, or wake up. It displays a full-screen logo, after initialization, then it syncs up to an input, and displays the input OSD.

30 seconds sounds like bad caps "warming up." 10-15 minutes like the OP is complaining about sounds... different. IMHO.

Delay due to a boot-up process is a whole other issue. (Non-issue, really.)

 

[wags69]

I have seen Asus VP228 monitors going for around $100 new.

 

[ElFenix]

30 seconds sounds like bad caps "warming up." 10-15 minutes like the OP is complaining about sounds... different. IMHO.

Delay due to a boot-up process is a whole other issue. (Non-issue, really.)

when my old dell 2001FPW was going out due to old capacitors it took longer and longer for the capacitors to warm up before the picture would finally stabilize. 5 to 10 minutes was probably the range, iirc. so, not out of the realm of possibility for 10-15, i'd say.

 

[chrx144]

Hi.The issue here is maybe, your drivers are not correctly updated or maybe the monitor needs to be fixed or replaced. You need to let a technician diagnose the problems if you are not an expert on the matter.