Re: DVR won't boot with SATA cable plugged in. AMDV10818
Posted: Thu Apr 18, 2024 3:45 am
Well normally a power supply for the camera is the same for the DVR a 2 amp power supply for 4 cameras. However it could be one with 8 cameras then it could be 2 power supplies and or 1 5amp power supply.
So if you were to look at the PSU for the DVR and one for the cameras, If they are same rated 2amp or same what ever amps and your DVR won't work with new HDD installed with cameras PSU in the DVR then more then likely the DVR is dead and will need repair or replace..
Again keep in mind that if the PSU for the cameras is 1.5 and dVR is 2amp then it wouldn't work.. Main issue is with DVR when HDD is connected there has to be a power supply that has the ability to support in rush current higher then the normal running current. Sometimes I have seen devices that were connected to a 2amp power supply with an inrush of 2.23amps and because the power supply had the ability to keep up seeing they under rated it that isn't always the case for these wall warts..
For kicks I just tested a different brand 8ch DVR that I happen to have on my Desk using a 5amp power supply that I use for testing I plugged in my Testing meter that displays V and A. Power supply was at 12.4v when I plugged into the meter, Then when I plugged into the DVR the In-Rush was 2.25amps for about 4 to 5 seconds. Then went steady to 770ma so less then an amp for just normal no accessing the DVR and then when there was motion on one of the channels it jumped to 782ma. At this hour where the cameras are pointing there is not much going on for more motion but my guess more cameras detecting motion it would go up little.. However as I was saying In-rush has to support a short burst of high current once the HDD has spun up then it will fall back well under the DVRs rated supply requirements to keep the PSU cool and lasting a while if it was running max all the time the PSU would not last long..
I am not saying you need to buy another power supply. I know not everyone has their cameras on a PDU and that means all the cameras power supplies are not being used so I have 40 2amp power supplies laying around that I don't use. I am saying that if they said it was your HDD and you installing a HDD and the unit will still not power up with new HDD installed then the issue is more then likely a bad PSU. However it could be a dead short on the HDD power rail but won't know unless there is a new or different high enough rated PSU to test.. Any power supply that is rated 12v and same or higher rated amps then the DVR requires would be good enough to test. Even an older Router, or other device might have 12v power. Even if you were to take your DVR out to your Vehicle and test with 12v device with same plug type would tell you if your system is working so you don't buy a power supply if your DVR is really dead...
So if you were to look at the PSU for the DVR and one for the cameras, If they are same rated 2amp or same what ever amps and your DVR won't work with new HDD installed with cameras PSU in the DVR then more then likely the DVR is dead and will need repair or replace..
Again keep in mind that if the PSU for the cameras is 1.5 and dVR is 2amp then it wouldn't work.. Main issue is with DVR when HDD is connected there has to be a power supply that has the ability to support in rush current higher then the normal running current. Sometimes I have seen devices that were connected to a 2amp power supply with an inrush of 2.23amps and because the power supply had the ability to keep up seeing they under rated it that isn't always the case for these wall warts..
For kicks I just tested a different brand 8ch DVR that I happen to have on my Desk using a 5amp power supply that I use for testing I plugged in my Testing meter that displays V and A. Power supply was at 12.4v when I plugged into the meter, Then when I plugged into the DVR the In-Rush was 2.25amps for about 4 to 5 seconds. Then went steady to 770ma so less then an amp for just normal no accessing the DVR and then when there was motion on one of the channels it jumped to 782ma. At this hour where the cameras are pointing there is not much going on for more motion but my guess more cameras detecting motion it would go up little.. However as I was saying In-rush has to support a short burst of high current once the HDD has spun up then it will fall back well under the DVRs rated supply requirements to keep the PSU cool and lasting a while if it was running max all the time the PSU would not last long..
I am not saying you need to buy another power supply. I know not everyone has their cameras on a PDU and that means all the cameras power supplies are not being used so I have 40 2amp power supplies laying around that I don't use. I am saying that if they said it was your HDD and you installing a HDD and the unit will still not power up with new HDD installed then the issue is more then likely a bad PSU. However it could be a dead short on the HDD power rail but won't know unless there is a new or different high enough rated PSU to test.. Any power supply that is rated 12v and same or higher rated amps then the DVR requires would be good enough to test. Even an older Router, or other device might have 12v power. Even if you were to take your DVR out to your Vehicle and test with 12v device with same plug type would tell you if your system is working so you don't buy a power supply if your DVR is really dead...